[PHP-70] Update changelog with the new version changes

Author: stefandanaita

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres
 to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.6.0] - 2024-02-09
+
+### Added
+
+- Support for setting the user's address using `$client->user()->address()`
+- Support for setting the user's date of birth using `$client->user()->dateOfBirth()`
+
 ## [1.5.0] - 2024-01-12
 
 ### Added