I'd used GitHub Actions for at least 6-12 months before even realising <thing>/<thing> was not something that got parsed by the action (like a namespace and method/function), but was simply a reference to a github user name and repo. That whole object should really have been called a 'repo', because that's what it is, and that would alert users to use extreme caution whenever using one that wasn't created by themselves.
Another fun fact related to this is that when someone changes their github username, their actions break. Just a hilariously bad design IMO. There should be a repository in between with immutable versions.
