[ci] Upgrade actions/checkout from v4 to v5 (#5859)

## Summary
- Upgrades all GitHub Actions workflows to use `actions/checkout@v5` 
- Updates 33 instances across 17 workflow files
- Ensures we're using the latest version with security patches and
improvements

## Changes
Updated the following workflow files from `actions/checkout@v4` to
`actions/checkout@v5`:
- `.github/workflows/backport.yaml`
- `.github/workflows/chromatic.yaml`
- `.github/workflows/claude-pr-review.yml`
- `.github/workflows/create-release-candidate-branch.yaml`
- `.github/workflows/dev-release.yaml`
- `.github/workflows/devtools-python.yaml`
- `.github/workflows/i18n-custom-nodes.yaml`
- `.github/workflows/json-validate.yaml`
- `.github/workflows/lint-and-format.yaml`
- `.github/workflows/pr-playwright-deploy.yaml`
- `.github/workflows/pr-storybook-deploy.yaml`
- `.github/workflows/test-ui.yaml`
- `.github/workflows/update-electron-types.yaml`
- `.github/workflows/update-manager-types.yaml`
- `.github/workflows/update-registry-types.yaml`
- `.github/workflows/version-bump.yaml`
- `.github/workflows/vitest.yaml`

Note: `.github/workflows/publish-frontend-types.yaml` and
`.github/workflows/release.yaml` were already using v5.

## Test plan
- [ ] CI workflows should continue to run successfully
- [ ] No functional changes - this is a dependency version upgrade only

🤖 Generated with [Claude Code](https://claude.ai/code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5859-ci-Upgrade-actions-checkout-from-v4-to-v5-27e6d73d3650815488adee20c74c0464)
by [Unito](https://www.unito.io)

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/backport.yaml

@@ -60,7 +60,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 

.github/workflows/chromatic.yaml

@@ -16,7 +16,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         
       - name: Post starting comment
         env:
@@ -38,7 +38,7 @@ jobs:
       workflow-url: ${{ steps.workflow-url.outputs.url }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
@@ -101,7 +101,7 @@ jobs:
       chromatic-storybook-url: ${{ steps.chromatic.outputs.storybookUrl }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0 # Required for Chromatic baseline
 
@@ -164,7 +164,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         
       - name: Download Storybook build
         if: needs.storybook-build.outputs.conclusion == 'success'

.github/workflows/claude-pr-review.yml

@@ -50,7 +50,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 

.github/workflows/create-release-candidate-branch.yaml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           token: ${{ secrets.PR_GH_TOKEN || secrets.GITHUB_TOKEN }}

.github/workflows/dev-release.yaml

@@ -15,7 +15,7 @@ jobs:
       version: ${{ steps.current_version.outputs.version }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Download dist artifact
         uses: actions/download-artifact@v4
         with:

.github/workflows/devtools-python.yaml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v5

.github/workflows/i18n-custom-nodes.yaml

@@ -22,13 +22,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout ComfyUI
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: comfyanonymous/ComfyUI
         path: ComfyUI
         ref: master
     - name: Checkout ComfyUI_frontend
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: Comfy-Org/ComfyUI_frontend
         path: ComfyUI_frontend
@@ -37,7 +37,7 @@ jobs:
         mkdir -p ComfyUI/custom_nodes/ComfyUI_devtools
         cp -r ComfyUI_frontend/tools/devtools/* ComfyUI/custom_nodes/ComfyUI_devtools/
     - name: Checkout custom node repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: ${{ inputs.owner }}/${{ inputs.repository }}
         path: 'ComfyUI/custom_nodes/${{ inputs.repository }}'

.github/workflows/json-validate.yaml

@@ -10,6 +10,6 @@ jobs:
   json-lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Validate JSON syntax
         run: ./scripts/cicd/check-json.sh

.github/workflows/lint-and-format.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout PR
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           ref: ${{ github.event.pull_request.head.ref }}

.github/workflows/pr-playwright-deploy.yaml

@@ -30,7 +30,7 @@ jobs:
           echo "Is forked: ${{ github.event.workflow_run.head_repository.full_name != github.event.workflow_run.repository.full_name }}"
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Get PR Number
         id: pr

.github/workflows/pr-storybook-deploy.yaml

@@ -30,7 +30,7 @@ jobs:
           echo "Is forked: ${{ github.event.workflow_run.head_repository.full_name != github.event.workflow_run.repository.full_name }}"
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Get PR Number
         id: pr

.github/workflows/test-ui.yaml

@@ -15,14 +15,14 @@ jobs:
       playwright-version: ${{ steps.playwright-version.outputs.PLAYWRIGHT_VERSION }}
     steps:
       - name: Checkout ComfyUI
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: 'comfyanonymous/ComfyUI'
           path: 'ComfyUI'
           ref: master
 
       - name: Checkout ComfyUI_frontend
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: 'Comfy-Org/ComfyUI_frontend'
           path: 'ComfyUI_frontend'
@@ -250,7 +250,7 @@ jobs:
     if: ${{ !cancelled() }}
     steps:
       - name: Checkout ComfyUI_frontend
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: 'Comfy-Org/ComfyUI_frontend'
           path: 'ComfyUI_frontend'
@@ -306,7 +306,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         
       - name: Get start time
         id: start-time
@@ -333,7 +333,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         
       - name: Download all playwright reports
         uses: actions/download-artifact@v4

.github/workflows/update-electron-types.yaml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4

.github/workflows/update-manager-types.yaml

@@ -17,7 +17,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
@@ -51,7 +51,7 @@ jobs:
             comfyui-manager-repo-${{ runner.os }}-
 
       - name: Checkout ComfyUI-Manager repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: Comfy-Org/ComfyUI-Manager
           path: ComfyUI-Manager

.github/workflows/update-registry-types.yaml

@@ -16,7 +16,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
@@ -50,7 +50,7 @@ jobs:
             comfy-api-repo-${{ runner.os }}-
 
       - name: Checkout comfy-api repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: Comfy-Org/comfy-api
           path: comfy-api

.github/workflows/version-bump.yaml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4

.github/workflows/vitest.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Install pnpm
       uses: pnpm/action-setup@v4