add missing _320

Author: Paul Barrett

Source/FikaAmazonAPI/AmazonSpApiSDK/Models/FulfillmentOutbound/EventCode.cs

@@ -108,10 +108,17 @@ public enum EventCode
 
         _309,
 
+        /// <summary>
+        /// Enum _320 for value: EVENT_320
+        /// </summary>
+
+        _320,
+
         /// <summary>
         /// Enum _401 for value: EVENT_401
         /// </summary>
 
+
         _401,
 
         /// <summary>