chore: update readme

Author: QingWei-Li

README.md

@@ -103,6 +103,6 @@ This project exists thanks to all the people who contribute. [[Contribute](CONTR
 
 ## License
 
-MIT
+[MIT](LICENSE)
 
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bhttps%3A%2F%2Fgithub.com%2Fdocsifyjs%2Fdocsify.svg?type=large)](https://app.fossa.io/projects/git%2Bhttps%3A%2F%2Fgithub.com%2Fdocsifyjs%2Fdocsify?ref=badge_large)