chore(release): Prepare for v1.2.0 release

Updates the CHANGELOG.md file, replacing the "[Unreleased]" section with the version number and release date for v1.2.0.

Author: Romelium

CHANGELOG.md

@@ -5,7 +5,7 @@ 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]
+## [1.2.0] - 2025-11-17
 
 ### Added