Update changelog

Author: Nicoretti

doc/changes/unreleased.md

@@ -3,10 +3,15 @@
 ## 🚨 Breaking Changes
 
 * Dropped python 3.8 support
+* Changed names of Documentation related nox tasks
+    - `build-docs` -> `docs:build`
+    - `open-docs` -> `docs:open`
+    - `clean-docs` -> `docs:clean`
 
 ## ✨ Added
 
 * Added support for multi version Documentation
+* Added nox tasks for building multi-version documentation
 
 ## 🐞 Fixed