Add license notice to README

Author: crichID

README.md

@@ -9,3 +9,5 @@ I'm the GitHub Learning Lab bot and I'm here to help guide you in your journey t
 ![issue tab](https://lab.github.com/public/images/issue_tab.png)
 
 I'll meet you over there, can't wait to get started!
+
+This repository is licensed under [MIT](../LICENSE) (c) 2019 GitHub, Inc.