Update README.md

Author: javadev

README.md

@@ -1,5 +1,6 @@
 # LeetCode-in-All
 
 [![Java CI](https://github.com/javadev/LeetCode-in-All/actions/workflows/maven.yml/badge.svg)](https://github.com/javadev/LeetCode-in-All/actions/workflows/maven.yml)
+[![CodeQL](https://github.com/javadev/LeetCode-in-All/actions/workflows/codeql.yml/badge.svg)](https://github.com/javadev/LeetCode-in-All/actions/workflows/codeql.yml)
 
 104 LeetCode algorithm problem solutions.