Fix: link has to have ID to check if layout is rendered.

Author: ilonatommy

src/Components/test/testassets/Components.WasmMinimal/Pages/NotFound/NotFoundLayout.razor

@@ -2,7 +2,7 @@
 
 <div class="page">
     <header class="top-bar">
-        <a href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a>
+        <a id="about-link" href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a>
     </header>
     <main>
         <article class="content px-4">