doc: Release V1.2.0

Author: thefeqy

CHANGELOG.md

@@ -1,29 +1,37 @@
-# 📜 Changelog
+# Changelog
 
 All notable changes to `GrokPHP/Client` will be documented in this file.  
 This project follows [Semantic Versioning](https://semver.org/).
 
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+## [v1.2.0] - 2025-02-24
+### Improvements
+- **Replaced Pest with PHPUnit** for testing, aligning with industry standards.
+- **Enhanced exception handling** to provide more structured and informative error responses.
+- **Updated GitHub Actions workflow** to support PHP 8.2, 8.3, and 8.4.
+
+---
+
 ## [v1.1.1] - 2025-02-11
-### 🔧 Improvements
+### Improvements
 - Refactored code formatting for better readability and maintainability.
 - Implemented **GitHub Actions CI** to run tests automatically on each push to the `main` branch.
 
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 ## [v1.1.0] - 2025-02-07
-### 🚀 Enhancements
+### Enhancements
 - **Upgraded to version `1.1.0`** with internal improvements and stability fixes.
 
 ---
 
 ## [v1.0.0] - 2025-02-06
-### 🎉 Initial Release
-- **🚀 Launched `GrokPHP/Client` v1.0.0** – a robust, framework-agnostic PHP client for interacting with Grok AI APIs.
+### Initial Release
+- **Launched `GrokPHP/Client` v1.0.0** – a robust, framework-agnostic PHP client for interacting with Grok AI APIs.
 
 ---
 
-### 📌 Notes
+### Notes
 - For detailed usage, refer to the [README.md](README.md).
 - Found an issue? Report it on [GitHub Issues](https://github.com/grok-php/client/issues).