fix link in readme

README.md

@@ -3,7 +3,7 @@ Reti Chess
 
 A lightweight, real-time chess app built in [Node](http://nodejs.org/), [Express](http://expressjs.com/), [Socket.IO](http://socket.io/), [React](http://facebook.github.io/react/), [Flux](http://facebook.github.io/flux/) and [Immutable](http://facebook.github.io/immutable-js/). Reti Chess also uses [chess.js](https://github.com/jhlywa/chess.js) for move validation and check/mate/draw detection.
 
-You can play the game on [www.retichess.com](http://wwww.retichess.com/).
+You can play the game on [www.retichess.com](http://www.retichess.com/).
 
 License
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