Update image in readme.

Author: kovacsv

README.md

@@ -6,7 +6,7 @@ Online 3D Viewer (https://3dviewer.net) is a free and open source web solution t
 [![Build Status](https://travis-ci.com/kovacsv/Online3DViewer.svg?branch=master)](https://travis-ci.com/kovacsv/Online3DViewer)
 [![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/kovacsv/Online3DViewer.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/kovacsv/Online3DViewer/context:javascript)
 
-<kbd><img src="website/assets/images/3dviewer_net_start_page.png?raw=true"></kbd>
+![Start Page](website/assets/images/3dviewer_net_start_page.png?raw=true)
 
 ## Documentation