update changelog

Author: aspeddro

CHANGELOG.md

@@ -16,6 +16,7 @@
 
 - Remove spacing between type definition in clients that do not support markdown links. https://github.com/rescript-lang/rescript-vscode/pull/619
 - Rename custom LSP methods names. https://github.com/rescript-lang/rescript-vscode/pull/611
+- Better performace for Inlay Hints and Codelens.
 
 #### :bug: Bug Fix