fix: set item.qty as mandatory in picklist (#27680)

diff --git a/erpnext/stock/doctype/pick_list_item/pick_list_item.json b/erpnext/stock/doctype/pick_list_item/pick_list_item.json
index 8665986..805286d 100644
--- a/erpnext/stock/doctype/pick_list_item/pick_list_item.json
+++ b/erpnext/stock/doctype/pick_list_item/pick_list_item.json
@@ -36,7 +36,8 @@
    "fieldname": "qty",
    "fieldtype": "Float",
    "in_list_view": 1,
-   "label": "Qty"
+   "label": "Qty",
+   "reqd": 1
   },
   {
    "fieldname": "picked_qty",
@@ -180,7 +181,7 @@
  ],
  "istable": 1,
  "links": [],
- "modified": "2020-06-24 17:18:57.357120",
+ "modified": "2021-09-28 12:02:16.923056",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Pick List Item",