Update plugins for the Jenkins ci_master machine
Update plugins for the Jenkins ci_master machine

See https://docs.publishing.service.gov.uk/manual/patching-jenkins.html#upgrading-plugins

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