fix: Improve hash collision error message to tell which PrefabHashGenerator is causing the collision.

Author: LukeStampfli

com.unity.multiplayer.mlapi/Runtime/Core/NetworkingManager.cs

@@ -316,7 +316,12 @@ private void OnValidate()
             {
                 if (hashes.Contains(NetworkConfig.NetworkedPrefabs[i].Hash))
                 {
-                    if (NetworkLog.CurrentLogLevel <= LogLevel.Normal) NetworkLog.LogError("PrefabHash collision! You have two prefabs with the same hash. This is not supported");
+                    if (NetworkLog.CurrentLogLevel <= LogLevel.Normal)
+                    {
+                        var prefabHashGenerator = NetworkConfig.NetworkedPrefabs[i].Prefab.GetComponent<NetworkedObject>().PrefabHashGenerator;
+                        NetworkLog.LogError($"PrefabHash collision! You have two prefabs with the same hash (PrefabHashGenerator = {prefabHashGenerator}). This is not supported");
+                    }
+
                 }
 
                 hashes.Add(NetworkConfig.NetworkedPrefabs[i].Hash);