Update CHANGELOG.md

Author: xernobyl

CHANGELOG.md

@@ -3,6 +3,7 @@
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
 ### [3.9.2](https://github.com/GetStream/stream-java/compare/v3.9.1...v3.9.2) (2024-02-19)
+* Ranking Variables in the Enriched Activities Endpoint
 
 ### [3.9.1](https://github.com/GetStream/stream-java/compare/v3.8.2...v3.9.1) (2024-01-09)