Update CHANGELOG.md

Author: pinkerltm

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to `dbression` are documented here.
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and this project
 adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [Released]
 
 ## [0.2.0] — 2026-06-01