chore: add forgotten CHANGELOG entry

the 1.0.0 was released in June 2024

Author: ccoVeille

CHANGELOG.md

@@ -8,7 +8,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.0.0] - 2024-06-29
 ### Added
 - initial version
 - LICENSE