Grant Create PR content write permissions. (#8848)

Our staging release workflow failed to merge branch. Grant the PR creation workflow `content` `write` permissions to fix this.

Author: DellaBitta

.github/workflows/release-pr.yml

@@ -26,6 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       pull-requests: write
+      contents: write
     if: ${{ !startsWith(github.event.head_commit.message, 'Version Packages (#') }}
     steps:
       - name: Checkout Repo