Add InternalTesting import to EnhancedNavigationTest

Author: captainsafia

src/Components/test/E2ETest/ServerRenderingTests/EnhancedNavigationTest.cs

@@ -7,6 +7,7 @@
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure;
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure.ServerFixtures;
 using Microsoft.AspNetCore.E2ETesting;
+using Microsoft.AspNetCore.InternalTesting;
 using OpenQA.Selenium;
 using OpenQA.Selenium.BiDi.Communication;
 using OpenQA.Selenium.Support.Extensions;