Update changelog with changes from v3.12.0

Author: newrelic-coreint-bot

CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
-### enhancements
+## v3.12.0 - 2025-06-18
+
+### 🚀 Enhancements
 - Included topic.name as it is required for creating a topic entity
 
 ## v3.11.0 - 2025-04-23