I set up this action and the scheduled run [failed](https://github.com/ben-manes/caffeine/runs/5025593098?check_suite_focus=true) with, ``` refs/heads/master not supported with 'schedule' event. Only the default branch 'refs/heads/null' is supported ``` Since I followed your guide and did not modify this action, I think there is a missing step somewhere?