Fix `govuk-delivery` in development vm Procfile
Fix `govuk-delivery` in development vm Procfile

The app is called `govuk-delivery` not `govuk_delivery`. This change
fixes the dev VM procfile so as it runs the app without having to rename
the directory that it clones into by default.

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