Update publishing-api Procfile line for Go.
Update publishing-api Procfile line for Go.

This also renames it to publishing-api-temp.  At present it's not in a
shape that's ready for use, so this means it won't be started by apps
that depend on the publishing-api interface (that's currently provided
by content-store)

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