Update app.component.html

updating for dotnet core 3.1

wwwroot/app/app.component.html

@@ -11,6 +11,6 @@
 <main>
 
     <router-outlet></router-outlet>
-    <h3>ASP.NET Core 2.2 And Angular implement of:  https://code.msdn.microsoft.com/How-to-achieve-a-bearer-9448db57</h3>
+    <h3>ASP.NET Core 3.1 And Angular(7.2.1) implement of:  https://code.msdn.microsoft.com/How-to-achieve-a-bearer-9448db57</h3>
     <h3>This is for learning purpose only</h3>
 </main>