Update README.md

Author: matthewgao

README.md

@@ -6,6 +6,7 @@
 
 [![Test](https://github.com/gwuhaolin/livego/actions/workflows/test.yml/badge.svg)](https://github.com/gwuhaolin/livego/actions/workflows/test.yml)
 [![Release](https://github.com/gwuhaolin/livego/actions/workflows/release.yml/badge.svg)](https://github.com/gwuhaolin/livego/actions/workflows/release.yml)
+[![CodeQL Advanced](https://github.com/gwuhaolin/livego/actions/workflows/codeql.yml/badge.svg)](https://github.com/gwuhaolin/livego/actions/workflows/codeql.yml)
 
 Simple and efficient live broadcast server:
 - Very simple to install and use;