Change a double quote to a single quote to fix the build
Change a double quote to a single quote to fix the build

- This was my fault for not checking thoroughly enough when merging
  (and tests not running on forks).

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