changed sidenav app title

Author: boriszv

flutter_sidenav/flutter_sidenav/lib/main.dart

@@ -8,7 +8,7 @@ class App extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Flutter Sidenav',
       theme: ThemeData(
         //
         primarySwatch: Colors.red,