[FIX] l10n_mn: update author
[FIX] l10n_mn: update author

As the Mongolia localisation was written by BumanIT

closes odoo/odoo#34671

Signed-off-by: Martin Trigaux (mat) <cc7c5be316e48d137cbb549833b85d91034d799d@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo