ci: update actions version, reuse workflow by composite action (#33177)

.github/workflows/pyrefly-diff.yml

@@ -17,12 +17,12 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: Setup Python & UV
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
         with:
           enable-cache: true
 
@@ -55,7 +55,7 @@ jobs:
           echo ${{ github.event.pull_request.number }} > pr_number.txt
 
       - name: Upload pyrefly diff
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: pyrefly_diff
           path: |
@@ -64,7 +64,7 @@ jobs:
 
       - name: Comment PR with pyrefly diff
         if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |