Pull request from a fork

[khaeru]

No description provided.

[khaeru]

@glatterf42 here is a working example.

• In the main branch, I found I had to use the following settings for actions/checkout:

  repository: ${{ github.event.workflow_run.head_repository.full_name }}
  ref: ${{ github.event.workflow_run.head_branch }}
  

  (note the difference between repository and head_respository; fullname and full_name).
• However it still has the limitations I described here, i.e. the successful "Test" workflow run is not reported back to the current PR.