docs: add release notes for 0.11 and 0.12 (#150)

Author: iBotPeaches

CHANGELOG.md

@@ -4,6 +4,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## v0.12.0 (2025-05-04)
+### Added
+- Add facade for `fineTuning` ([#125](https://github.com/openai-php/laravel/pull/125))
+- Make base url configurable ([#144](https://github.com/openai-php/laravel/pull/144))
+
+### Changed
+- Changed underlying `openai/client` package version from 0.11.0 to 0.12.0
+
+### Removed
+- Removed support for PHP 8.1
+
+## v0.11.0 (2025-02-24)
+### Added
+- Add support for Laravel 12 ([#137](https://github.com/openai-php/laravel/pull/137))
+
 ## v0.10.1 (2024-06-06)
 ### Changed
 - Changed underlying `openai/client` package version from 0.9.1 to v0.10.1