fix: cache directory path always in PATH env

[Xplouder]

Currently, only when the cr is installed the PATH env is updated with the cache directory, resulting in a working behavior for the first time but in consequents runs in the following error:

Looking up latest tag...
Discovering changed charts since 'test-0.0.8'...
Packaging chart 'charts/test'...
/tmp/_work/B5Gz2/_actions/helm/chart-releaser-action/v1.2.1/cr.sh: line 243: cr: command not found
Error: Process completed with exit code 127.

This might not be a problem in stateless runners since there the cr is always installed, but for stateful ones, its easy to replicate.

[afranzi]

Any update on moving forward with this PR, we are having the same issue? :)

[afranzi]

@cpanato could we get your review please? 😬

[mpbauer]

I am facing the same issue with self-hosted GitHub Action runners and it would be really nice if this change would be approved soon.