Additional information for GH actions

[dkarlovi]

Trying to setup this action currently on my repo, not sure where the secrets.PRIVATE_TOKEN is supposed to be defined, the current docs are not clear on that.

Also, the provided sample config file could use some environment variables instead of the hardcoded org/project so it's easier to get started.

[dkarlovi]

The issue here actually seems to be me using SSH based repo URLs, so the action gets into this:

The authenticity of host 'github.com (140.82.121.3)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no/[fingerprint])? 

and doesn't seem to be able to continue on its own. I can see this is supported for Gitlab, is it supported for Github?