chore: Replace calling reusable actions from apify/workflows/... to apify/actions/... [internal]

[fnesveda]

It was confusing that we have our custom GitHub actions in a repository called workflows. I've moved them to a new repository called actions, and this PR replaces the references to the actions to point to the new repository.

There are no functional changes, the actions just moved.

[jancurn]

wouldn't apify/github-actions be even a better name?

[fnesveda]

wouldn't apify/github-actions be even a better name?

It might be, although I think just apify/actions is fine too, in every context they're used it's obvious they're GitHub Actions.

I wanted to keep the name consistent with apify/workflows, where we don't have the github- prefix either, and renaming that repo would mean everything would break immediately and I'd have to send 100 PRs to fix it, and with the first-party actions (like actions/checkout), which are also just actions and always have a succinct name.