fix broken go live email notification

tests/app/service/test_sender.py

@@ -1,13 +1,16 @@
 import pytest
 from flask import current_app
-from app.utils import hilite
 from sqlalchemy import func, select
 
 from app import db
-from app.dao.services_dao import dao_add_user_to_service, dao_fetch_active_users_for_service
+from app.dao.services_dao import (
+    dao_add_user_to_service,
+    dao_fetch_active_users_for_service,
+)
 from app.enums import NotificationType, TemplateType
 from app.models import Notification
 from app.service.sender import send_notification_to_service_users
+from app.utils import hilite
 from tests.app.db import create_service, create_template, create_user