add continue-on-error-comment

[mansona]

This is adding https://github.com/mainmatter/continue-on-error-comment so we can get a green CI for things that we expect to pass 👍

[github-actions[bot]]

Some tests with 'continue-on-error: true' have failed:

• ember-release

  • ember-canary
  • embroider-optimized
  • ember-beta
  • embroider-safe

  Created by continue-on-error-comment