Unless you're building custom actions for your workflows I think you should be fine. Generally on all the projects were I have setup GitHub actions it just ins

Unless you're building custom actions for your workflows I think you should be fine. Generally on all the projects were I have setup GitHub actions it just installs system/project packages and executes shell commands/scripts. So if it's down, as a developer I can just run the same commands locally. Sure, there are a few GitHub specific things in there, but mostly for developet experience. E.g. commenting back on PR, inline CI error messages, uploading release tarballs automatically.