Documentation link is broken on home page

Hi,

The github homepage of play framework has a broken link.

It's in the [Learn More](https://github.com/playframework/playframework#learn-more) section of the page.

Click [Get Started with Java](http://www.playframework.com/documentation/latest/JavaTodoList).

The correct href should be http://www.playframework.com/documentation/2.3.x/Home