update CHANGELOG

Author: d-biehl

CHANGELOG.md

@@ -9,7 +9,7 @@ All notable changes to the "robotcode" extension will be documented in this file
 - some refactoring to speedup loading and parsing documents
 - semantic tokens now highlight 
   - builtin keywords
-  - run keywords
+  - run keywords, also nested run keywords
 - analysing run keywords now correctly unescape keywords
 
 ##  0.3.2