Fix broken links

There were still a few links pointing to `/features/using-notify`

tests/app/main/views/test_activity.py

@@ -521,7 +521,10 @@ def test_html_contains_links_for_failed_notifications(
     mock_get_service_data_retention,
     mocker,
 ):
-    mock_get_notifications(mocker, active_user_with_permissions, noti_status='technical-failure')
+    mock_get_notifications(mocker,
+                           active_user_with_permissions,
+                           diff_template_type="sms",
+                           noti_status='technical-failure')
     response = client_request.get(
         'main.view_notifications',
         service_id=SERVICE_ONE_ID,

tests/app/main/views/test_index.py

@@ -114,6 +114,15 @@ def test_old_static_pages_redirect(
     )
 
 
+def test_message_status_page_contains_message_status_ids(client_request):
+    # The 'email-statuses' and 'sms-statuses' id are linked to when we display a message status,
+    # so this test ensures we don't accidentally remove them
+    page = client_request.get('main.message_status')
+
+    assert page.find(id='email-statuses')
+    assert page.find(id='sms-statuses')
+
+
 def test_old_using_notify_page(client_request):
     client_request.get('main.using_notify', _expected_status=410)