BARN-77: update CHANGELOG

Author: cgaroutte

CHANGELOG.md

@@ -4,7 +4,7 @@ Inspired by [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 Note: This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [3.0.0] - UNRELEASED
+## [3.0.0] - 2025-11-25
 ### Added
 - Added optional context_overrides argument for the following methods:
     - `ParameterSubstitution.find_tokens`