Add CHANGELOG entry

Author: mediremi

CHANGELOG.md

@@ -16,6 +16,7 @@
 
 - Take namespace into account for incremental cleanup. https://github.com/rescript-lang/rescript-vscode/pull/1164
 - Potential race condition in incremental compilation. https://github.com/rescript-lang/rescript-vscode/pull/1167
+- Fix extension crash triggered by incremental compilation. https://github.com/rescript-lang/rescript-vscode/pull/1169
 
 #### :nail_care: Polish