[FIX] sale_stock: `display_name` on lot list

Display the `display_name` rathe rthan the `name` in order to include
the variant specification.

opw-2170400

closes odoo/odoo#43725

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/sale_stock/models/account_move.py

@@ -88,7 +88,7 @@ class AccountMove(models.Model):
             if float_is_zero(qty, precision_rounding=lot_id.product_id.uom_id.rounding):
                 continue
             lot_values.append({
-                'product_name': lot_id.product_id.name,
+                'product_name': lot_id.product_id.display_name,
                 'quantity': qty,
                 'uom_name': lot_id.product_uom_id.name,
                 'lot_name': lot_id.name,