Failed to setup GitHub token: Error: Workflow validation failed. The workflow file must exist and have identical content to the version on the repository's default branch. If you're seeing this on a PR when you first add a code review workflow file to your repository, this is normal and you should ignore this error. If you instead wish to use this action with a custom GitHub token or custom GitHub app, provide a `github_token` in the `uses` section of the app in your workflow yml file.