update changelog

Author: mununki

CHANGELOG.md

@@ -32,6 +32,10 @@
 - Fix location issue in make function in JSX V4 that breaks dead code elimination https://github.com/rescript-lang/syntax/pull/660
 - Fix parsing (hence pretty printing) of expressions with underscore `_` and comments.
 
+#### :nail_care Polish
+
+- Change the internal representation of props for the lowercase components to record. https://github.com/rescript-lang/syntax/pull/665
+
 ## ReScript 10.0
 
 - Fix printing for inline nullary functor types [#477](https://github.com/rescript-lang/syntax/pull/477)