chore(SimpleMemberSelectionApp): Update Async ListState Initializer to Value Initializer

Author: DevTKSS

src/DevTKSS.Uno.SimpleMemberSelectionApp/Presentation/DashboardModel.cs

@@ -17,7 +17,7 @@ public DashboardModel()
 
     public IState<string> DashboardTitle => State<string>.Value(this, () => "Hallo vom Dashboard");
 
-    public IListState<string> DashboardList => ListState.Async(this, GetMembers)
+    public IListState<string> DashboardList => ListState.Value(this, () => _listMembers)
                                                         .Selection(SelectedMember);
 
     public IState<string> SelectedMember => State<string>.Empty(this);