[README] platform updated

README.md

@@ -2,7 +2,7 @@
 
 [![CMake](https://github.com/yanyiwu/cppjieba/actions/workflows/cmake.yml/badge.svg)](https://github.com/yanyiwu/cppjieba/actions/workflows/cmake.yml)
 [![Author](https://img.shields.io/badge/[email protected]?style=flat)](http://yanyiwu.com/) 
-[![Platform](https://img.shields.io/badge/platform-Linux,%20OS%20X,%20Windows-green.svg?style=flat)](https://github.com/yanyiwu/cppjieba)
+[![Platform](https://img.shields.io/badge/platform-Linux,macOS,Windows-green.svg?style=flat)](https://github.com/yanyiwu/cppjieba)
 [![Performance](https://img.shields.io/badge/performance-excellent-brightgreen.svg?style=flat)](http://yanyiwu.com/work/2015/06/14/jieba-series-performance-test.html) 
 [![Tag](https://img.shields.io/github/v/tag/yanyiwu/cppjieba.svg)](https://github.com/yanyiwu/cppjieba/releases)
 [![License](https://img.shields.io/badge/license-MIT-yellow.svg?style=flat)](http://yanyiwu.mit-license.org)