[FIX] pos_daily_sales_reports: correct invoice ref

This commit corrects the invoice reference showed in the daily reports
of the PoS.

closes odoo/odoo#127920

X-original-commit: 779f2abbb5b36a05add2c1c0fbf087c0a01cf4b3
Signed-off-by: Robin Heinz (rhe) <rhe@odoo.com>
Signed-off-by: Adrien Guilliams (adgu) <adgu@odoo.com>

addons/point_of_sale/models/pos_session.py

@@ -2040,7 +2040,7 @@ class PosSession(models.Model):
         for order in self.order_ids.filtered(lambda o: o.is_invoiced):
             invoice = {
                 'total': order.account_move.amount_total,
-                'name': order.account_move.highest_name,
+                'name': order.account_move.name,
                 'order_ref': order.pos_reference,
             }
             invoice_list.append(invoice)