Update CHANGELOG

Author: mpkorstanje

CHANGELOG.md

@@ -6,6 +6,8 @@ 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]
+### Add
+- Upgrade Cucumber Messages to v22
 
 ## [0.1.0] - 2022-12-27
 ### Added