add new 'updated' field to supplier price break table

InvenTree/company/templates/company/supplier_part.html

@@ -268,6 +268,11 @@ $('#price-break-table').inventreeTable({
                 return html;
             }
         },
+        {
+            field: 'updated',
+            title: '{% trans "Last updated" %}',
+            sortable: true,
+        },
     ]
 });