[FIX] base_wamas_ubl: picking external ref

Author: jbaudoux

base_wamas_ubl/lib/wamas/wamas_grammar/ausk.py

@@ -70,7 +70,7 @@
             "type": "str",
             "length": 20,
             "dp": False,
-            "ubl_path": "DespatchAdvice.cac:Shipment.cbc:HandlingCode",
+            "ubl_path": "DespatchAdvice.cac:OrderReference.cbc:ID",
             "df_val": False,
             "df_func": False,
         },