Adding the key name to the url broke downloading the gds.asc keys.
Adding the key name to the url broke downloading the gds.asc keys.

This reverts fd9ac73e40f16e28d1120.  Whilst Mat is on honeymoon it's
hard to know what he was intending.

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