message: build: fix deprecation notice in scripts/github/merge-pr script
  The deprecation notice for the merge-pr script errantly referenced
  'ng dev' rather than 'ng-dev', this PR corrects this.
  PR Close
diff: @@ -22,7 +22,7 @@ favor of using ng-dev.
  To merge a pr using the new tooling run:
  -$ yarn -s ng dev pr merge <pr-number>
  +$ yarn -s ng-dev pr merge <pr-number>
  ################################################"
  # Sleep a short time to highlight deprecate notice.
  