Add 'Keep a Changelog' badge to CONTRIBUTING.md

Added a badge for 'Keep a Changelog' to the contributing guidelines.

Author: stiwicourage

CONTRIBUTING.md

@@ -1,8 +1,8 @@
 ## Contributing
 
-[![CodeScene Hotspot Code Health](https://codescene.io/projects/78904/status-badges/hotspot-code-health)](https://codescene.io/projects/78904)
 [![CodeScene Average Code Health](https://codescene.io/projects/78904/status-badges/average-code-health)](https://codescene.io/projects/78904)
 [![codecov](https://codecov.io/github/stiwicourage/NovaModuleTools/graph/badge.svg?token=BLZP94DZKX)](https://codecov.io/github/stiwicourage/NovaModuleTools)
+[![KeepAChangelog PS Module](https://img.shields.io/badge/changelog-Keep%20a%20Changelog-%23E05735)](https://keepachangelog.ps)
 
 **This repository is intentionally opinionated about maintainability, however, we welcome contributions that align with
 our goals. We want to keep the codebase clean, maintainable, and easy to understand for both users and contributors.**