A GitHub action to avoid being caught by GitHub zip issues on CI

[lydell]

Small note: https://docs.github.com/en/actions/advanced-guides/caching-dependencies-to-speed-up-workflows#usage-limits-and-eviction-policy

GitHub will remove any cache entries that have not been accessed in over 7 days.

So if you have a not very active repo, you might not be saved by cache.