github actions cache: Use more unique key

[autoantwort]

Description: If multiple jobs with stale steps exists in a repo we want a cache entry per run. Otherwise the cached state is used across different stale jobs

Solution Use the hash of the inputs of the action as unique key.

Related issue: https://github.com/actions/stale/issues/1133

Check list:

• [ ] Mark if documentation changes are required.
• [ ] Mark if tests were added or updated to cover the changes.

[autoantwort]

@HarithaVattikuti Can you approve the ci workflows? :) A working stale action would be nice.