CI script installer action does not cycle cache when scripts change

[komish]

Ref: https://github.com/openshift-helm-charts/development/blob/main/.github/actions/install-ci-scripts/action.yml#L21

When the PyGithub RateLimitOverview bugfix1 was merged, it wasn't used in the very next CI run because Actions had already cached the installation of the tooling that included the older script. The cache keys don't factor in source code changes, and probably needs to in some way.