Updated CHANGELOG.md

Author: infobip-ci

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to the library will be documented in this file.
 The format of the file is based on [Keep a Changelog](http://keepachangelog.com/)
 and this library adheres to [Semantic Versioning](http://semver.org/) as mentioned in [README.md][readme] file.
 
-## [ [4.1.2](https://github.com/infobip/infobip-api-java-client/releases/tag/4.1.2) ] - 2024-03-07
+## [ [4.2.0](https://github.com/infobip/infobip-api-java-client/releases/tag/4.2.0) ] - 2024-03-07
 
 ⚠️ **IMPORTANT NOTE:** This release contains compile time breaking changes.
 All changes, including breaking changes, are addressed and explained in the list bellow.