feat: screenshot updated

Author: kulgavy

README.md

@@ -5,7 +5,7 @@ built with [React](https://facebook.github.io/react/), [Bootstrap](http://getboo
 
 [Demo](https://flatlogic-react-dashboard.herokuapp.com/). Use following credentials: user/password.
 
-[![react-dashboard](https://flatlogic.com/uploads/react-dashboard.png)](https://flatlogic-react-dashboard.herokuapp.com/)
+[![react-dashboard](screenshot.png)](https://flatlogic-react-dashboard.herokuapp.com/)
 
 This seed project is a sort of a free version of a template that may be found on
 [Themeforest](https://themeforest.net/category/site-templates/admin-templates)