[FIX] account: date in log must a string not a date object
[FIX] account: date in log must a string not a date object

Closes #29248

closes odoo/odoo#29262
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo