Update CHANGELOG

Author: stefanzweifel

CHANGELOG.md

@@ -5,9 +5,15 @@ 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).
 
-## [Unreleased](https://github.com/stefanzweifel/php-changelog-updater/compare/v1.8.0...HEAD)
+## [Unreleased](https://github.com/stefanzweifel/php-changelog-updater/compare/v1.9.0...HEAD)
 
 <!-- New Release notes will be placed here automatically -->
+## [v1.9.0](https://github.com/stefanzweifel/php-changelog-updater/compare/v1.8.0...v1.9.0) - 2023-07-02
+
+### Added
+
+- Add new `--parse-github-usernames` option to parse and linkify GitHub Usernames ([#41](https://github.com/stefanzweifel/php-changelog-updater/pull/41))
+
 ## [v1.8.0](https://github.com/stefanzweifel/php-changelog-updater/compare/v1.7.0...v1.8.0) - 2023-05-29
 
 ### Added