[FIX] note: fix _notification_recipients
[FIX] note: fix _notification_recipients

Since revision 458aaca328491a993f7458520b047869a770325e,
the `groups` args of the method `_notification_recipients`
is a list of tuple, and no longer a dict.

The code here has not been adapted to this change.
It is now.

opw-695300

ygol/odoo,ygol/odoo,ygol/odoo,dfang/odoo,dfang/odoo,dfang/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo