Code highlight correction (Views\AllNotesPage.xaml). (#1333)

This PR request fixes a code highlighting issue in the Microsoft .NET MAUI documentation by updating the "highlight" attribute to highlight specific lines of code. Specifically, on line 85, the new highlight attribute value is set to "3,7,12,20-21".

docs/tutorials/notes-mvvm/includes/viewmodel-notes.md

@@ -82,7 +82,7 @@ Update the **AllNotes view**:
 01. In the **Solution Explorer** pane of Visual Studio, double-click on **Views\\AllNotesPage.xaml**.
 01. Paste in the following code:
 
-    :::code language="xaml" source="../snippets/viewmodel-shared/csharp/Notes/Views/AllNotesPage.xaml" id="full" highlight="4,8,13,21-22":::
+    :::code language="xaml" source="../snippets/viewmodel-shared/csharp/Notes/Views/AllNotesPage.xaml" id="full" highlight="3,7,12,20-21":::
 
 The toolbar no longer uses the `Clicked` event and instead uses a command.