Update nt1.md
Update nt1.md

corrected number of T1 sites
neicnordic/neic.no,neicnordic/experimental.neic.nordforsk.org,neicnordic/neic.no,neicnordic/neic.no,neicnordic/experimental.neic.nordforsk.org,neicnordic/experimental.neic.nordforsk.org