fix: Unable to add items in POS Invoice

(cherry picked from commit 7a3f8a5afb)

erpnext/selling/page/point_of_sale/pos_controller.js

@@ -684,7 +684,7 @@ erpnext.PointOfSale.Controller = class {
 		const is_stock_item = resp[1];
 
 		frappe.dom.unfreeze();
-		const bold_uom = item_row.stock_uom.bold();
+		const bold_uom = item_row.uom.bold();
 		const bold_item_code = item_row.item_code.bold();
 		const bold_warehouse = warehouse.bold();
 		const bold_available_qty = available_qty.toString().bold();