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/weekly-docs-check.yaml

@@ -22,18 +22,18 @@ jobs:
     timeout-minutes: 45
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
-          fetch-depth: 0
+          fetch-depth: 50
           ref: main
 
       - 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: '20'
           cache: 'pnpm'
@@ -49,7 +49,7 @@ jobs:
           fi
 
       - name: Run Claude Documentation Review
-        uses: anthropics/claude-code-action@v1.0.6
+        uses: anthropics/claude-code-action@ff34ce0ff04a470bd3fa56c1ef391c8f1c19f8e9 # v1.0.38
         with:
           prompt: |
             Is all documentation still 100% accurate?
@@ -130,7 +130,7 @@ jobs:
 
       - name: Create or Update Pull Request
         if: steps.check_changes.outputs.has_changes == 'true'
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
         with:
           token: ${{ secrets.PR_GH_TOKEN }}
           commit-message: 'docs: weekly documentation accuracy update'