Update CHANGELOG.md

Author: sonallux

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 - Change the API of the recommendations request. All `seed*` parameters are now considered optional because not all of them are always required. It must be at least one `seed*` parameter present.
 - Add player's get queue request
+- Add audiobooks and chapters API
 - Bump jackson to `2.13.4`
 
 ## [3.0.1]