Increase locations-api unicorn workers to match Mapit
Increase locations-api unicorn workers to match Mapit

We are not sure how many unicorn works we need yet, but to start
with we can match what Mapit has for now.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet