[FIX] test_mail: bump expected query count
[FIX] test_mail: bump expected query count

The prefetch hell patch [1] generate one more query.

[1] a07a076c45fc4b83caa9ab30ca919b30016015a7

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo