[FIX] mail: display 💔 in messages
[FIX] mail: display 💔 in messages

The emoji was displayed in the list of choice but was not correctly rendered
when sent to the server.
Similar to 0e3d5941dadf but for broken heart

closes odoo/odoo#35367

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