Fix typo in windows dns server
Fix typo in windows dns server

fnaard/pltraining-classroom,binford2k/pltraining-classroom,puppetlabs/pltraining-classroom,binford2k/pltraining-classroom,puppetlabs/pltraining-classroom,binford2k/pltraining-classroom,fnaard/pltraining-classroom,puppetlabs/pltraining-classroom,fnaard/pltraining-classroom