Fix incorrect sample application URLs in popup docs (#624)

* Initial plan

* Fix incorrect sample application URLs in popup documentation

Remove '/Pages' from sample app URLs in popup-options.md, popup-result.md,
and popup-complex.md to point to the correct paths in the Maui repository.

Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com>

Author: Copilot

docs/maui/views/popup/popup-complex.md

@@ -264,7 +264,7 @@ public partial class PopupsPage : ContentPage
 
 ## Examples
 
-You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Pages/Views/Popups/ComplexPopup.xaml).
+You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Views/Popups/ComplexPopup.xaml).
 
 ## API
 

docs/maui/views/popup/popup-options.md

@@ -126,7 +126,7 @@ await this.ShowPopupAsync(new SimplePopup(), new PopupOptions
 
 ## Examples
 
-You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Pages/Views/Popups/ReturnResultPopup.xaml).
+You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Views/Popups/ReturnResultPopup.xaml).
 
 ## API
 

docs/maui/views/popup/popup-result.md

@@ -167,7 +167,7 @@ Please refer to the [PopupOptions Documentation](./popup-options.md) to learn mo
 
 ## Examples
 
-You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Pages/Views/Popups/ReturnResultPopup.xaml).
+You can find an example of this feature in action in the [.NET MAUI Community Toolkit Sample Application](https://github.com/CommunityToolkit/Maui/blob/main/samples/CommunityToolkit.Maui.Sample/Views/Popups/ReturnResultPopup.xaml).
 
 ## API