A lot of repos are being under attack where branches are being created under the name [REDACTED] to trigger GH actions and send all secrets to a webhook website. This is new and here is an example:
[REDACTED]
Just search on github and you will see planty repos.
I redacted the names to avoid spreading and teaching people how to get other people's secrets. I am in contact with Github and will update here once they solve the issue.