Something changed in GitHub Actions recently (for instance, there is now "Post Check out the code"
step in my build log); v2.2 started crashing with some Python stacktrace; v2.6 does not crash,
but no changes get pushed (I just get "Your branch is up to date"). When I added rebase: true, I got: "Please tell me who you are. ... user.email ... user.name ..." - looks like defaults do not apply in the rebase case, so I had to set email and name explicitly...