PRs created by actions do not trigger checks

In some projects, we have actions workflows that raise PRs on the project. These are usually dependency bumping PRs like this one.

Recently I’ve noticed those PRs are not triggering any checks to run and I have to manually push an empty commit onto the branch to trigger it.

How can I have automated PRs trigger checks?

It looks like the PR was created by an actions workflow, too. Did that use the GITHUB_TOKEN for authorization? In that case this point from the documentation applies:

When you use the repository’s GITHUB_TOKEN to perform tasks on behalf of the GitHub Actions app, events triggered by the GITHUB_TOKEN will not create a new workflow run.

You need to use a PAT if you want to trigger workflows from workflows.