chore(workflow): update workflow settings

.github/workflows/pr-compress-images.yml

@@ -17,6 +17,7 @@ jobs:
     # Only run on Pull Requests within the same repository, and not from forks.
     if: github.event.pull_request.head.repo.full_name == github.repository
     name: calibreapp/image-actions
+    permissions: write-all
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo