Scheduled github action never gets triggered

Why doesn’t this github action ever get triggered?

name: Every Five Alive

# Schedule a job
    # * is a special character in YAML so you have to quote this string
    - cron:  '*/5 * * * *'


I can see the scheduled workflow can be triggered normally on your repository now.
Looks like, the problem has gone.

Recently, there were several GitHub Incidents for GitHub Actions (see here), maybe the problem was cause by the Incidents.