Update CHANGELOG.md

Author: isc-tleavitt

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).
 
-## [2.8.0] - Unreleased
+## [2.8.0] - 2024-12-06
 
 ### Added
 - Production Decomposition mode allows controlling interoperability productions as individual files for each host (#469)