Add changelog entry

Author: nojaf

CHANGELOG.md

@@ -33,7 +33,8 @@
 #### :bug: Bug fix
 
 - Fix `typeof` parens on functions. https://github.com/rescript-lang/rescript/pull/7643
-- Add --dev flag to clean command. https://github.com/rescript-lang/rescript/pull/7622
+- Rewatch: Add --dev flag to clean command. https://github.com/rescript-lang/rescript/pull/7622
+- Rewatch: Use root package suffix in clean log messages. https://github.com/rescript-lang/rescript/pull/7648
 
 # 12.0.0-beta.1