Speaker voucher code email template (#8)

Author: marcoacierno

pythonit_toolkit/emails/templates.py

@@ -7,6 +7,7 @@ class EmailTemplate(str, Enum):
     SUBMISSION_ACCEPTED = "submission-accepted"
     NEW_SCHEDULE_INVITATION_ANSWER = "new-schedule-invitation-answer"
     SUBMISSION_SCHEDULE_TIME_CHANGED = "submission-schedule-time-change"
+    SPEAKER_VOUCHER_CODE = "speaker-voucher-code"
 
     def __str__(self) -> str:
         return str.__str__(self)