Workspace cache is not saved when scala-steward run fails

[EnviousSwan]

At the moment workspace cache is saved only after a successful run at the very end of try block

scala-steward-action/src/action/main.ts

Line 86 in 2763313

await workspace.saveWorkspaceCache()

So when one of your repos becomes archived or your app token expires after 1 hour (#625) the whole run fails and the cache is not saved. The problem is that on subsequent runs it needs to start from scratch and check all the repos again, even though they have already been successfully updated before.