Update CHANGELOG.md

Author: razzmatazz

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 * Upgrade Roslyn to 4.11.0
+* Fix an issue where server breaks when inspecting class/properties involved in source-generated code:
+  - By @granitrocky in https://github.com/razzmatazz/csharp-language-server/pull/189
 
 ## [0.15.0] - 2024-08-15 / Šventoji
 * Upgrade Roslyn to 4.10.0: