Chore: Actions updates and cleanup (#8377)

## Summary

...

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8377-WIP-Chore-Actions-updates-and-cleanup-2f66d73d3650818483a8dffa32a6f245)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Amp <amp@ampcode.com>

.github/workflows/release-biweekly-comfyui.yaml

@@ -61,13 +61,13 @@ jobs:
 
     steps:
       - name: Checkout ComfyUI_frontend
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           path: frontend
 
       - name: Checkout ComfyUI (sparse)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: Comfy-Org/ComfyUI
           sparse-checkout: |
@@ -75,12 +75,12 @@ jobs:
           path: comfyui
 
       - name: Install pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
         with:
           version: 10
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: lts/*
 
@@ -169,7 +169,7 @@ jobs:
 
     steps:
       - name: Checkout ComfyUI fork
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ inputs.comfyui_fork || 'Comfy-Org/ComfyUI' }}
           token: ${{ secrets.PR_GH_TOKEN }}