Allow Isles of Scilly in tags
Allow Isles of Scilly in tags

They have their own special area type in mapit (COI) so we have to add
it to the list.  Also we update the comment pointing out the other
places that this list needs to be synchronized with.

alphagov/business-support-api,alphagov/business-support-api,alphagov/business-support-api,alphagov/business-support-api