[Web] Fix dead link to Qt enterprise on http://qt-project.org/downloads

[Koehne Kai]

Hi,

Could someone fix the last link, labeled 'Evaluate Qt under a commercial license (qt.digia.com)', on http://qt-project.org/downloads ? 

I suggest to replace the target

  http://qt.digia.com/Try-Qt-Now/

with

  http://qt.digia.com/download/

(as it's already done on the top of the page. Maybe also unify the text of the link?)

Regards

Kai