Update changelog for 3.0.9

Author: kitchen-porter

CHANGELOG.md

@@ -5,7 +5,7 @@ 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/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## 3.0.9 - *2024-12-04*
 
 ## 3.0.8 - *2024-05-02*