Fix typo in permission-contents key

Author: BigSpaceships

.github/workflows/sync-branches.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           app-id: ${{ secrets.APP_ID }}
           private-key: ${{ secrets.APP_SECRET }}
-          permission-content: write
+          permission-contents: write
 
       - uses: actions/checkout@v5
         with: