[FIX] l10n_ar: error when opening products on e-commerce

- install e-commerce and l10n_ar;
- as a Public user open a product on the shop.

Before this commit, an 403 error was raised.

Now, the public user can navigate through the products.

opw-2462477

closes odoo/odoo#66839

X-original-commit: 9a047c6a
Signed-off-by: Jorge Pinna Puissant (jpp) <jpp@odoo.com>

addons/l10n_ar/models/account_fiscal_position.py

@@ -34,7 +34,7 @@ class AccountFiscalPosition(models.Model):
                     partner_id).l10n_ar_afip_responsibility_type_id.id),
                 ('company_id', '=', company.id),
             ]
-            return self.search(domain, limit=1)
+            return self.sudo().search(domain, limit=1)
         return super().get_fiscal_position(partner_id, delivery_id=delivery_id)
 
     @api.onchange('l10n_ar_afip_responsibility_type_ids', 'country_group_id', 'country_id', 'zip_from', 'zip_to')