chore: Update the port of the codec tests

Author: EmandM

com.unity.netcode.gameobjects/Tests/Runtime/DistributedAuthority/DistributedAuthorityCodecTests.cs

@@ -30,7 +30,7 @@ internal class DistributedAuthorityCodecTests : NetcodeIntegrationTest
         private NetworkManager Client => m_ClientNetworkManagers[0];
 
         private string m_TransportHost = Environment.GetEnvironmentVariable("NGO_HOST") ?? "127.0.0.1";
-        private const int k_TransportPort = 7777;
+        private const int k_TransportPort = 7788;
         private const int k_ClientId = 0;
 
         private GameObject m_SpawnObject;