docs: update changelog

Author: owenvoke

CHANGELOG.md

@@ -4,6 +4,6 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com) and this project adheres to [Semantic Versioning](https://semver.org).
 
-## [11.0.0 - 2024-04-18](https://github.com/laravel-zero/framework/releases/tag/v11.0.0)
+## [12.0.0 - 2024-04-18](https://github.com/laravel-zero/framework/releases/tag/v12.0.0)
 
-Check the upgrade guide in the [Official Laravel Zero Upgrade Documentation](https://laravel-zero.com/docs/upgrade#upgrade-11.0.0). Also, you can see some changes in the [Official Laravel Upgrade Documentation](https://laravel.com/docs/11.x/upgrade).
+Check the upgrade guide in the [Official Laravel Zero Upgrade Documentation](https://laravel-zero.com/docs/upgrade#upgrade-11.0.0). Also, you can see some changes in the [Official Laravel Upgrade Documentation](https://laravel.com/docs/12.x/upgrade).