[FIX] loyalty: fix next order coupon mail template

Default mail template for coupon on next order was linked to the gift
card mail template, but it should be linked to loyalty coupon card.

OPW-3281621

closes odoo/odoo#124927

X-original-commit: ece055c105a3a1cbd3621f25765668594af9837e
Signed-off-by: Vallaeys Valentin (vava) <vava@odoo.com>

addons/loyalty/models/loyalty_program.py

@@ -331,7 +331,10 @@ class LoyaltyProgram(models.Model):
                 })],
                 'communication_plan_ids': [(5, 0, 0), (0, 0, {
                     'trigger': 'create',
-                    'mail_template_id': (self.env.ref('loyalty.mail_template_gift_card', raise_if_not_found=False) or self.env['mail.template']).id,
+                    'mail_template_id': (
+                        self.env.ref('loyalty.mail_template_loyalty_card', raise_if_not_found=False)
+                        or self.env['mail.template']
+                    ).id,
                 })],
             },
         }