Update README.md

Author: shenxianpeng

README.md

@@ -2,6 +2,7 @@
 
 [![Build](https://github.com/cpp-linter/clang-tools-static-binaries/actions/workflows/build.yml/badge.svg)](https://github.com/cpp-linter/clang-tools-static-binaries/actions/workflows/build.yml)
 [![Test](https://github.com/cpp-linter/clang-tools-static-binaries/actions/workflows/test.yml/badge.svg)](https://github.com/cpp-linter/clang-tools-static-binaries/actions/workflows/test.yml)
+![](https://img.shields.io/badge/platform-linux--64%20%7C%20win--64%20%7C%20osx--64%20-blue)
 
 Includes clang-format, clang-tidy and clang-query.