Update src/Components/test/E2ETest/Tests/FileDownloadTest.cs

Co-authored-by: Copilot <[email protected]>

Author: rolandVi

src/Components/test/E2ETest/Tests/FileDownloadTest.cs

@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-# nullable enable
+#nullable enable
 
 using BasicTestApp;
 using BasicTestApp.MediaTest;