docs: Adding context about MainViewModel in Counter app variants XAML/MVUX and C#/MVUX + typo fix

Author: hiadamhere

doc/articles/getting-started/counterapp/get-started-counter-csharp-mvux.md

@@ -89,7 +89,7 @@ Also, for more information on all the template options, see [Using the Uno Platf
 
 ## Data Binding
 
-Now that we have the **`MainModel`** class, we can update the **`MainPage`** to use data binding to connect the UI to the application logic.
+As the application uses MVUX, the `MainModel` class is used to generate a bindable ViewModel, `MainViewModel`. We can update the **`MainPage`** to use data binding to connect the UI to the application logic.
 
 - Let's add the **`DataContext`** to our page. To do so, add `.DataContext(new MainViewModel(), (page, vm) => page` before `.Background(...)`. Remember to close the **`DataContext`** expression with a `)` at the end of the code. It should look similar to the code below:
 

doc/articles/getting-started/counterapp/get-started-counter-xaml-mvux.md

@@ -89,7 +89,7 @@ Also, for more information on all the template options, see [Using the Uno Platf
 
 ## Data Binding
 
-Now that we have the **`MainModel`** class, we can update the **`MainPage`** to use data binding to connect the UI to the application logic.
+As the application uses MVUX, the `MainModel` class is used to generate a bindable ViewModel, `MainViewModel`. We can update the **`MainPage`** to use data binding to connect the UI to the application logic.
 
 - Add a **`DataContext`** element to the **`Page`** element in the **MainPage.xaml** file.
 

doc/articles/getting-started/counterapp/get-started-counter-xaml-mvvm.md

@@ -119,7 +119,7 @@ Now that we have the **`MainViewModel`** class, we can update the **`MainPage`**
              TextAlignment="Center" />
     ```
 
-- Add a new **`Button`** with a  **`Command`** attribute that is bound to the **`IncrementCommand`** property of the **`MainViewModel`**.
+- Update the **`Button`** by adding a **`Command`** attribute that is bound to the **`IncrementCommand`** property of the **`MainViewModel`**.
 
     ```xml
     <Button Margin="12"