message: build: update pull-request config
  This changes are needed due to the recent updates in ng-dev tool
diff: @@ -9,7 +9,7 @@ export const pullRequest: PullRequestConfig = {
  default: 'rebase',
  labels: [{ pattern: 'squash commits', method: 'squash' }],
  },
  - mergeReadyLabel: /^action: merge(-assistance)?/,
  - caretakerNoteLabel: /(action: merge-assistance)/,
  - commitMessageFixupLabel: 'commit message fixup',
  + mergeReadyLabel: 'action: merge',
  + caretakerNoteLabel: 'action: merge-assistance',
  + commitMessageFixupLabel: 'needs commit fixup',
  };
  