Updated readme

Author: javadev

README.md

@@ -7,6 +7,7 @@
 [![javadoc](https://javadoc.io/badge2/com.github.javadev/leetcode-in-java/javadoc.svg)](https://javadoc.io/doc/com.github.javadev/leetcode-in-java)
 [![](https://img.shields.io/github/stars/javadev/LeetCode-in-Java?style=flat-square)](https://github.com/javadev/LeetCode-in-Java)
 [![](https://img.shields.io/github/forks/javadev/LeetCode-in-Java?style=flat-square)](https://github.com/javadev/LeetCode-in-Java/fork)
+[![](https://img.shields.io/badge/-LeetCode%20in%20Kotlin-blue?style=flat-square)](https://github.com/javadev/LeetCode-in-Kotlin)
 
 Java Solution for LeetCode algorithm problems, continually updating.