Update changelog for 11.8.4

Author: kitchen-porter

CHANGELOG.md

@@ -5,7 +5,7 @@ This file is used to list changes made in each version of the docker cookbook.
 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
+## 11.8.4 - *2024-12-11*
 
 - Update documentation for `docker_container` resource
 - Update documentation for `docker_service` resource