Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -20,7 +20,7 @@
 
 - Add support for for `async`/`await` https://github.com/rescript-lang/rescript-compiler/pull/5537
 
-- Initial support for JSX V4, still work in progress.
+- Initial support for JSX V4 including genType, still work in progress.
   - :boom: when V4 is activated, at most one component is allowed for each module.
 
 #### :bug: Bug Fix