Fix direct file in args case in payment return email gateway
CHANGELOG:
### FIXED
- [#585](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/585) Fix direct file in args case in payment return email gateway
Edited by Pelayo García
CHANGELOG:
### FIXED
- [#585](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/585) Fix direct file in args case in payment return email gateway