Update README.md

Author: iliakan

README.md

@@ -5,6 +5,7 @@ This repository hosts the content of the Modern JavaScript Tutorial, published a
 
 Other languages:
 - Russian: [https://github.com/iliakan/javascript-tutorial-ru](https://github.com/iliakan/javascript-tutorial-ru).
+- Chinese: the ongoing translation at [https://github.com/iliakan/javascript-tutorial-cn](https://github.com/iliakan/javascript-tutorial-cn), go ahead to join.
 
 Please use this repository to file issues and suggest PRs for the text.