docs: Merge pull request #9 from testing-library/link-to-jest-dom

Author: gnapse

README.md

@@ -2,7 +2,7 @@
 
 [![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors)
 
-lint rules for use with jest-dom
+lint rules for use with [jest-dom](https://github.com/testing-library/jest-dom).
 
 ## Installation