Try checkout PR head instead of SHA

.github/workflows/Black.yml

@@ -2,17 +2,17 @@ name: Black Formatting
 on: [pull_request]
 jobs:
   black:
-    if: ${{ github.actor != 'dependabot[bot]' }} # Do not run on commits created by dependabot
+    if: ${{ github.actor != 'dependabot[bot]' }}
     runs-on: ubuntu-latest
     permissions:
-      # Give the default GITHUB_TOKEN write permission to commit and push the changed files.
-      contents: write # Allows reading and writing repository contents (e.g., commits)
-      pull-requests: write # Allows reading and writing pull requests
+      contents: write
+      pull-requests: write
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.sha }}
-          token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.head_ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+          token: ${{ secrets.GITHUB_TOKEN }}  # Use a PAT with repo scope
 
       - name: Black Code Formatter
         uses: psf/black@stable