prepare changelog for release (from GitHub Actions)

Author: CCDL-Bot

CHANGELOG.md

@@ -4,6 +4,7 @@ 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/).
 
 ## [Unreleased]
+## [2.2.0] 2026-04-03
 ### Changed
 - Moved "vanilla maps" toggle from settings into the map loading dialog to allow quick switching between mod and vanilla maps [#347](https://github.com/CCDirectLink/crosscode-map-editor/issues/347)