Allow write permissions in workflow that creates auto merge PR

Without this, pushing the new branch fails when the repository doesn’t allow write permission to all workflows by default (which repos in swiftlang don’t).

Author: ahoppen

.github/workflows/create_automerge_pr.yml

@@ -22,8 +22,11 @@ name: Create automerge PR
 # jobs:
 #   create_merge_pr:
 #     name: Create PR to merge main into release branch
-#     uses: swiftlang/github-workflows/.github/workflows/create_autmerge_pr.yml@main
+#     uses: swiftlang/github-workflows/.github/workflows/create_automerge_pr.yml@main
 #     if: (github.event_name == 'schedule' && github.repository == 'swiftlang/swift-format') || (github.event_name != 'schedule')  # Ensure that we don't run this on a schedule in a fork
+#     permissions:
+#       contents: write
+#       pull-requests: write
 #     with:
 #       base_branch: release/6.2
 
@@ -47,6 +50,9 @@ jobs:
   create_merge_pr:
     name: Create PR to merge ${{ inputs.head_branch }} into ${{ inputs.base_branch }} branch
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4