Stop referencing `require` as part of creating a new `*Builder`
Stop referencing `require` as part of creating a new `*Builder`

As a result of #293 this is no longer true, so update the docs so that
#we stop confusing people who read docs before diving into code.

alphagov/manuals-publisher,ministryofjustice/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,ministryofjustice/specialist-publisher,ministryofjustice/specialist-publisher,alphagov/manuals-publisher,alphagov/specialist-publisher,ministryofjustice/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/manuals-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild