Update changelog to release v0.27.0

Author: stephenafamo

CHANGELOG.md

@@ -36,7 +36,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [v0.27.0] - 2024-06-05
 
 ### Added