Added badge

Author: kakakakakku

README.md

@@ -1,6 +1,7 @@
 # redash-hands-on
 
 [![GitHub stars](https://img.shields.io/github/stars/kakakakakku/redash-hands-on.svg?style=for-the-badge)](https://github.com/kakakakakku/redash-hands-on/stargazers)
+[![Redash version](https://img.shields.io/badge/redash-v4.0.1-ff7964.svg?style=for-the-badge)](https://github.com/getredash/redash)
 
 ## 前提