[BUG] save-always input doesn't work

[deemp]

Describe the bug

I set save-always: true, but c-n-a didn't save the cache (link).

To Reproduce

Run linked workflow in a fork.

Expected behavior

The cache is saved despite an error on a step

Additional context

Currently, c-n-a implements save-always in a wrong way just like actions/cache does (actions/cache#1315).

actions/cache#1325 may fix the problem for actions/cache.

UPD

The save-always attribute will probably be deprecated in future (actions/cache#1315 (comment)). It's advised to have separate restore and save steps.

[deemp]

I've removed it in #50 since it'll be removed in the future releases of actions/cache

https://github.com/actions/cache/blob/0c907a75c2c80ebcb7f088228285e798b750cf8f/action.yml#L33