meta: make review-wanted message minimal

PR-URL: https://github.com/nodejs/node/pull/55607
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>

.github/workflows/notify-on-review-wanted.yml

@@ -35,6 +35,7 @@ jobs:
       - name: Slack Notification
         uses: rtCamp/action-slack-notify@4e5fb42d249be6a45a298f3c9543b111b02f7907  # 2.3.0
         env:
+          MSG_MINIMAL: actions url
           SLACK_COLOR: '#3d85c6'
           SLACK_ICON: https://github.com/nodejs.png?size=48
           SLACK_TITLE: ${{ steps.define-message.outputs.title }}