chore: add a minor develop log for transport shutdown on connection manager shutdown when islistening

Author: 0xFA11

com.unity.netcode.gameobjects/Runtime/Connection/NetworkConnectionManager.cs

@@ -960,6 +960,11 @@ internal void Shutdown()
                 if (transport != null)
                 {
                     transport.Shutdown();
+
+                    if (NetworkManager.LogLevel <= LogLevel.Developer)
+                    {
+                        NetworkLog.LogInfo($"{nameof(NetworkConnectionManager)}.{nameof(Shutdown)}() -> {nameof(IsListening)} && {nameof(NetworkManager.NetworkConfig.NetworkTransport)} != null -> {nameof(NetworkTransport)}.{nameof(NetworkTransport.Shutdown)}()");
+                    }
                 }
             }
         }