Updated the changelog.md

changelog.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Improve `@http:Query` annotation to overwrite the query parameter name in service](https://github.com/ballerina-platform/ballerina-library/issues/7006)
 - [Add header name mapping support in record fields](https://github.com/ballerina-platform/ballerina-library/issues/7018)
 - [Introduce util functions to convert query and header record with the `http:Query` and the `http:Header` annotations](https://github.com/ballerina-platform/ballerina-library/issues/7019)
+- [Migrate client and service data binding lang utils usage into data.jsondata module utils `toJson` and `parserAsType`] (https://github.com/ballerina-platform/ballerina-library/issues/6747)
 
 ## [2.12.0] - 2024-08-20