Add PR branches from forks to CI

[mrinalwadhwa]

PRs from a fork currently don't trigger the pipeline.

[vvv]

This information might be useful:

• GitHub Actions improvements for fork and pull request workflows — posted 4 weeks ago

  Today GitHub Actions shipped a series of features designed to improve your workflows when working with PRs from repository forks.

• Pull request events for forked repositories

  When you create a pull request from a forked repository to the base repository, GitHub sends the pull_request event to the base repository and no pull request events occur on the forked repository.

  Workflows don't run on forked repositories by default. You must enable GitHub Actions in the Actions tab of the forked repository.

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[mrinalwadhwa]

Thanks for the pointers, I'll check it out.

[mrinalwadhwa]

This works now, thank you @vvv for the early pointers 🙏