Don't trigger on label assignment

[adam3smith]

Would it be possible to not run this when labels are assigned, just on updated files in the PR?

[retorquere]

The easiest way would be to just remove labeled here and replace what it does with workflow_dispatch (which would mean "safe to test" would always have to be ran manually) or keep the label check but require a commit (which can be empty) to trigger "safe to test".