fix link in example code (#36260)

Author: timdeschryver

aspnetcore/data/ef-mvc/intro/samples/5cu/Views/Home/Index.cshtml

@@ -22,6 +22,6 @@
     <div class="col-md-4">
         <h2>Download it</h2>
         <p>You can download the completed project from GitHub.</p>
-        <p><a class="btn btn-default" href="https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/data/ef-mvc/intro/samples/5cu-final">See project source code &raquo;</a></p>
+        <p><a class="btn btn-default" href="https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/data/ef-mvc/intro/samples/cu-final">See project source code &raquo;</a></p>
     </div>
-</div>
+</div>