Update CHANGELOG

Author: thrawn01

CHANGELOG

@@ -4,6 +4,10 @@ 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).
 
+## [2.3.0] - 2022-01-06
+### Added
+* Added Group.Set() to allow users to explicity set values in the cache.
+
 ## [2.2.1] - 2021-01-13
 ### Changes
 * Now uses the much faster fnv1