Update MauiAppBuilder.cs (#3445)

Fix the comment

src/Core/src/Hosting/MauiAppBuilder.cs

@@ -108,7 +108,7 @@ public MauiApp Build()
 			});
 
 			// This needs to go here to avoid adding the IHostedService that boots the server twice (the GenericWebHostService).
-			// Copy the services that were added via WebApplicationBuilder.Services into the final IServiceCollection
+			// Copy the services that were added via MauiAppBuilder.Services into the final IServiceCollection
 			_hostBuilder.ConfigureServices((context, services) =>
 			{
 				// We've only added services configured by the GenericWebHostBuilder and WebHost.ConfigureWebDefaults