[FIX] purchase: es_AR translation typo
[FIX] purchase: es_AR translation typo

Fixing it directly by commit since there is no es_AR on transifex.

The issue of the ticket has been solved by transifex, this is for
another similar issue that has been found.

opw-1907924
closes #28929
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo