fix version

v3 instead of v1

Author: Stayrony

samples/aspnetcore/ByNamespaceSample/V3/Controllers/OrdersController.cs

@@ -7,8 +7,8 @@
     [Route( "v{version:apiVersion}/[controller]" )]
     public class OrdersController : Controller
     {
-        // GET ~/v1/orders/{accountId}
+        // GET ~/v3/orders/{accountId}
         [HttpGet( "{accountId}" )]
         public IActionResult Get( string accountId ) => Ok( new Order( GetType().FullName, accountId, HttpContext.GetRequestedApiVersion().ToString() ) );
     }
-}
+}