Simplified branch protection workflow

.github/workflows/branch-protection.yaml

@@ -3,24 +3,24 @@ on:
   pull_request:
     types: [opened, synchronize]
 
+permissions:
+  pull-requests: write  # Allows commenting on and closing PRs
+
 jobs:
   prevent_merge:
     runs-on: ubuntu-latest
     steps:
-      - name: Check branch names
+      - name: Comment and Close PR if merging from sic-main to main
         if: github.event.pull_request.base.ref == 'main' && github.event.pull_request.head.ref == 'sic-main'
         run: |
           # Post a comment on the PR
-          curl -s -X POST -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
+          curl -s -X POST -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
           -H "Content-Type: application/json" \
-          -d '{"body": "Merging from `sic-main` to `main` is not allowed. This pull request will be automatically closed."}' \
-          "${{ github.event.pull_request.url }}/comments"
+          -d '{"body": "Pull requests from `sic-main` to `main` are not allowed. This PR will be closed automatically."}' \
+          "${{ github.event.pull_request.comments_url }}"
 
           # Close the PR
-          curl -s -X PATCH -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
+          curl -s -X PATCH -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
           -H "Content-Type: application/json" \
           -d '{"state": "closed"}' \
           "${{ github.event.pull_request.url }}"
-        env:
-          PR_SOURCE_BRANCH: ${{ github.event.pull_request.head.ref }}
-          PR_TARGET_BRANCH: ${{ github.event.pull_request.base.ref }}