message: build: Cancel in-progress job to free up concurrent groups
diff: @@ -11,6 +11,12 @@ on:
  description: If the commit you want to test isn't the head of a branch, provide its SHA here
  required: false
  +# Cancel in progress workflows on pull_requests.
  +# https://docs.github.com/en/actions/using-jobs/using-concurrency#example-using-a-fallback-value
  +concurrency:
  + group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  + cancel-in-progress: true
  +
  env:
  # We pin the exact version to enforce reproducable builds with node + npm.
  DEFAULT_NODE_VERSION: '16.15.1'
  