ci: document tiendabot PAT scope requirements

.github/workflows/release-please.yml

@@ -30,6 +30,7 @@ jobs:
           # https://docs.github.com/en/actions/using-workflows/triggering-a-workflow#triggering-a-workflow-from-a-workflow
           # TIENDABOT_ACCESS_TOKEN is a Personal Access Token (PAT) for the tiendabot user in kolonialno github org.
           # This is a ugly hack but works for now.
+          # The token require permissions to write PRs in the repo and the PAT require the 'public_repo' scope.
           token: ${{ secrets.TIENDABOT_ACCESS_TOKEN }}
           config-file: release-please-config.json
           manifest-file: .release-please-manifest.json