Update NavMenu.razor to use project name (#50194)

Author: danroth27

src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWeb-CSharp/Components/Layout/NavMenu.razor

@@ -1,6 +1,6 @@
 <div class="top-row ps-3 navbar navbar-dark">
     <div class="container-fluid">
-        <a class="navbar-brand" href="">MyBlazorWeb</a>
+        <a class="navbar-brand" href="">BlazorWeb-CSharp</a>
     </div>
 </div>