Since we have stopped using Travis, we should just remove it from this info message and have it default to Github Actions.
[ Info: add a secure environment variable named 'DOCUMENTER_KEY' to https://travis-ci.com/$USER/$REPO/settings (if you deploy using Travis CI) or https://github.com/$USER/$REPO/settings/secrets (if you deploy using GitHub Actions) with value:
Since we have stopped using Travis, we should just remove it from this info message and have it default to Github Actions.