update router to user BusinessUpdateArguments for /business-profile

Frontend/patient_manager/lib/router/routeGenerator.dart

@@ -89,10 +89,10 @@ class RouteGenerator {
         return _errorRoute();
 
       case '/business-profile':
-        if (args is AppUser) {
+        if (args is BusinessUpdateArguments) {
           return MaterialPageRoute(
             builder: (_) => ProfileBusinessUpdate(
-              signedInUser: args,
+              arguments: args,
             ),
           );
         }