Fixed action workflow error in stale-issue.yaml
@shmishra99 Can you please resolve conflicts? Thank you!
**Issue**: Workflow is giving error while running.Error msg-The workflow is not valid. .github/workflows/stale-issues.yml 
**Fixed**: Followed stale/action workflow [docs](https://github.com/actions/stale#any-of-labels).
Changed any-of-labels value to ',' string.
Changed only-issue-labels to only-labels to work for both PR and issues.
