ci: add/update workflow for autosquash on PRs

Author: wetransformer

.github/workflows/tf-autosquash.yml

@@ -30,7 +30,7 @@ jobs:
           private-key: ${{ secrets.WE_HELPER_GITHUB_PRIVATE_KEY }}
 
       - name: Checkout the repository and persist credentials
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           token: ${{ steps.app-token.outputs.token || github.token }}