Handling of too-big cache

[HebaruSan]

I realized belated this should have been a Discussion, about to delete my comment:

What does this action do if the contents of the individual cache folder is 5 GiB or greater, not just the total collection of all saved caches? Does it not save it at all?

Thanks to @PathogenDavid for the answer!

#342 (comment)

@HebaruSan It won't save anything at all.

https://github.com/actions/toolkit/blob/73d5917a6b5ea646ac3173cfceb727ee914ff6ed/packages/cache/src/cache.ts#L166-L175

[PathogenDavid]

No problem!