Set bulk publishing for taxonomy publisher
Set bulk publishing for taxonomy publisher

Since we'll be running this in production, we should make sure that
we do not block other users of the publishing api. By setting
`bulk_publishing` to `true` the publihsing api should send this to
the low priority queue.

See https://github.com/alphagov/publishing-api/blob/8b5972debd7a5b71de9d8d71bd8e78cbf843dc78/app/commands/v2/put_content.rb#L171

alphagov/content-tagger,alphagov/content-tagger,alphagov/content-tagger