update changelog [skip ci]

Author: tillkruss

CHANGELOG.md

@@ -5,6 +5,9 @@ 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).
 
+## [2.0.1] - 2023-12-15
+- Fixed Relay build for heroku-22
+
 ## [2.0.0] - 2023-12-12
 - Added PHP 8.2 and 8.3 support
 - Dropped `heroku-18` support