Certification sign up : Update email content to moderator

[sumandari]

The email sent and cc’d to moderators should include a link to the orgs page for easy review

see: https://github.com/kartoza/prj.app/blob/8885b4e60f7c90de8e00fb2f4ed411948c7045bd/django_project/certification/views/certifying_organisation.py#L486