Add missing translation.

configuration.py

@@ -18,7 +18,7 @@ class Configuration:
                                 ('company', 'in',
                                  [Eval('context', {}).get('company', -1), None])]))
     ul_production_type = fields.Property(
-        fields.Selection([('location', 'Location')], 'Production type', required=True))
+        fields.Selection([('location', 'Location')], 'UL Production type', required=True))
 
     @classmethod
     def default_ul_production_type(cls):

locale/es_ES.po

@@ -34,6 +34,10 @@ msgctxt "field:stock.configuration,unit_load_sequence:"
 msgid "Load unit Sequence"
 msgstr "Secuencia de unidad de carga"
 
+msgctxt "field:stock.configuration,ul_production_type:"
+msgid "UL Production type"
+msgstr "Tipo producción UdC"
+
 msgctxt "field:stock.move,unit_load:"
 msgid "Unit load"
 msgstr "Unidad de carga"