feat: Re-add comment about preview URL

Author: ADubhlaoich

.github/workflows/docs-build-push.yml

@@ -48,7 +48,7 @@ jobs:
     if: ${{ github.event.repository.fork == false && needs.vars.outputs.azure_creds == 'true' }}
     uses: nginxinc/docs-actions/.github/workflows/docs-build-push.yml@9c59fab05a8131f4d691ba6ea2b6a119f3ef832a # v1.0.7
     permissions:
-      pull-requests: write
+      pull-requests: write # Required to add the preview URL comment
       contents: read
     with:
       production_url_path: "/nginx-gateway-fabric"