Add BDA email as an option to fix NL updates

Commit [1] removed default BDA email address from extract_ml_registrations script code. We should now add it to cron.

[1] 3dd5f6e3e0

See merge request bde/nk20!305

note.cron

@@ -27,5 +27,5 @@ MAILTO=notekfet2020@lists.crans.org
 # Vider les tokens Oauth2
  00  6     *   *   *     root   cd /var/www/note_kfet && env/bin/python manage.py cleartokens -v 0
 # Envoyer la liste des abonnés à la NL BDA
- 00  10     *   *   0     root   cd /var/www/note_kfet && env/bin/python manage.py extract_ml_registrations -t art
+ 00  10     *   *   0     root   cd /var/www/note_kfet && env/bin/python manage.py extract_ml_registrations -t art -e "bda.ensparissaclay@gmail.com"