Fix pinned commit hash link to use blob/main instead

Replace the pinned commit hash (52607dc4...) in the Constants.cs link
with blob/main, since the old commit doesn't contain 10.0/ paths.

Agent-Logs-Url: https://github.com/dotnet/AspNetCore.Docs/sessions/d6ed9e02-7265-4725-bb90-ed3ccf0f04ca

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

Author: Copilot

aspnetcore/mobile/native-mobile-backend.md

@@ -34,7 +34,7 @@ Tapping an item on the main page navigates to an edit page where the item's name
 
 ![Edit item dialog](native-mobile-backend/_static/todo-android-edit-item.png)
 
-To test it out yourself against the ASP.NET Core app created in the next section, if you host it online, update the app's [`RestUrl`](https://github.com/dotnet/maui-samples/blob/52607dc4ebf19a51ce59694b57e704b67600f69b/10.0/WebServices/TodoREST/TodoREST/Constants.cs#L6) constant. Otherwise, the app will communicate with the ASP.NET Core app that's hosted locally on your machine.
+To test it out yourself against the ASP.NET Core app created in the next section, if you host it online, update the app's [`RestUrl`](https://github.com/dotnet/maui-samples/blob/main/10.0/WebServices/TodoREST/TodoREST/Constants.cs#L6) constant. Otherwise, the app will communicate with the ASP.NET Core app that's hosted locally on your machine.
 
 Android emulators don't run on the local machine and use a loopback IP (10.0.2.2) to communicate with the local machine. Use .NET MAUI's [DeviceInfo](/dotnet/maui/platform-integration/device/information) class to detect the operating system the app is running on to use the correct URL.