In collaborative team development, we often fork someone else's repository first, and after the development is completed, we will mention PR to the original repository, but this can't trigger the PR preview deployment. If the repository owner develops on his/her own repository and pushes the branch to his/her own repository, and then raises a PR to his/her own repository, this can trigger a PR preview. But I want to realize that PR preview deployment can be triggered for anyone's PR. How should this be done?