Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -33,9 +33,9 @@
 - AST cleanup: use inline record for `Ptyp_arrow`. https://github.com/rescript-lang/rescript/pull/7250
 - Playground: Bundle stdlib runtime so that the playground can execute functions from Core/Belt/Js. (#7255)
 - Allow single newline in JSX. https://github.com/rescript-lang/rescript/pull/7246
+- AST cleanup: Remove `res.namedArgLoc` attribute and store the location information directly into the label. https://github.com/rescript-lang/rescript/pull/7247
 
 #### :nail_care: Polish
-
 - Rewatch 1.0.10. https://github.com/rescript-lang/rescript/pull/7259
 
 # 12.0.0-alpha.7