Minor renames to clarify join codes.

Keep forgetting how to tag this, but let's try: [apply-change:a7f97ad3-049d-441d-8e2b-5f9e984488cc]

Assets/Prefabs/UI/JoinContent.prefab

           m_StringArgument: 
           m_BoolArgument: 0
         m_CallState: 2
-  m_LobbyButtonPrefab: {fileID: 7018369548608736188, guid: f6d35a456ba76a24587dce83bd088b7d,
-    type: 3}
+  m_LobbyButtonPrefab: {fileID: 7018369548608736188, guid: f6d35a456ba76a24587dce83bd088b7d, type: 3}
   m_LobbyButtonParent: {fileID: 7824921818678239159}
 --- !u!114 &7550446569341709048
 MonoBehaviour:
     m_PersistentCalls:
       m_Calls:
       - m_Target: {fileID: 1462126939442648229}
-        m_TargetAssemblyTypeName: LobbyRooms.UI.JoinMenuUI, LobbyRooms
-        m_MethodName: OnJoinCodeInputFieldChanged
+        m_TargetAssemblyTypeName: LobbyRelaySample.UI.JoinMenuUI, LobbyRelaySample
+        m_MethodName: OnLobbyCodeInputFieldChanged
         m_Mode: 0
         m_Arguments:
           m_ObjectArgument: {fileID: 0}
       propertyPath: m_Name
       value: Spinner
       objectReference: {fileID: 0}
-    - target: {fileID: 7859013680193933450, guid: c9b04951bd45e154b8096955d9bc8a0b,
-        type: 3}
+    - target: {fileID: 7859013680193933450, guid: c9b04951bd45e154b8096955d9bc8a0b, type: 3}
-    - target: {fileID: 8141644855275361747, guid: c9b04951bd45e154b8096955d9bc8a0b,
-        type: 3}
+    - target: {fileID: 8141644855275361747, guid: c9b04951bd45e154b8096955d9bc8a0b, type: 3}
       propertyPath: m_Pivot.x
       value: 0.5
       objectReference: {fileID: 0}

Assets/Scripts/Relay/RelayAPIInterface.cs

                     onComplete.Invoke(a.Result.Data.JoinCode);
                 else
                 {
-                    Debug.LogError($"Join Code Get returned a non Success code: {a.Status}");
+                    Debug.LogError($"Relay GetJoinCodeAsync returned a non-success code: {a.Status}");
                 }
             });
         }

Assets/Scripts/Relay/RelayUtpSetup.cs

     }
 
     /// <summary>
-    /// Client logic: Wait until the join code is retrieved from the lobby's shared data. Then, use that code to get the Allocation to bind to, and
+    /// Client logic: Wait until the Relay join code is retrieved from the lobby's shared data. Then, use that code to get the Allocation to bind to, and
     /// then create a connection to the host.
     /// </summary>
     public class RelayUtpSetupClient : RelayUtpSetup

Assets/Scripts/UI/JoinMenuUI.cs

             m_LocalLobbySelected = lobby.Data;
         }
 
-        public void OnJoinCodeInputFieldChanged(string newCode) // TODO: LobbyCode or JoinCode?
+        public void OnLobbyCodeInputFieldChanged(string newCode)
         {
             if (!string.IsNullOrEmpty(newCode))
                 m_LocalLobbySelected = new LocalLobby.LobbyData(newCode.ToUpper());