Update README.md

Author: pphatdev

README.md

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 # Luna Date - PHP Khmer Calendar Library
 
-[![CI Status](https://github.com/pphatdev/luna/workflows/CI/badge.svg)](https://github.com/pphatdev/luna/actions)
+[![CI](https://github.com/pphatdev/luna-date/actions/workflows/ci.yml/badge.svg)](https://github.com/pphatdev/luna-date/actions/workflows/ci.yml)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![PHP Version](https://img.shields.io/badge/PHP-%3E%3D7.4-blue.svg)](https://php.net)
 [![codecov](https://codecov.io/gh/pphatdev/luna/branch/main/graph/badge.svg)](https://codecov.io/gh/pphatdev/luna)