refactor: update main chart

Author: mrholek

src/views/dashboard/Dashboard.js

@@ -51,7 +51,7 @@ import avatar6 from 'src/assets/images/avatars/6.jpg'
 
 import WidgetsBrand from '../widgets/WidgetsBrand'
 import WidgetsDropdown from '../widgets/WidgetsDropdown'
-import MainChart from '../charts/MainChart'
+import MainChart from './MainChart'
 
 const Dashboard = () => {
   const progressExample = [