docs: update README.md

Author: utrodus

README.md

@@ -1,7 +1,7 @@
 
 # 🇲🇾 Malaysia Public Holiday
 ![PHP Version](https://img.shields.io/badge/PHP-%3E%3D8.2-blue)
-
+[![Build Status](https://github.com/utrodus/malaysia-public-holiday/actions/workflows/tests.yaml/badge.svg?label=Build+Status)](https://github.com/utrodus/malaysia-public-holiday/actions/workflows/tests.yaml)
 
 **Malaysia Public Holiday** is a PHP library to fetch **official public holiday data** for all Malaysian states by scraping [Office Holidays](https://www.officeholidays.com/countries/malaysia).