Update puhuri.md
Update puhuri.md

corrected frequency and backgroud to other
neicnordic/experimental.neic.nordforsk.org,neicnordic/neic.no,neicnordic/neic.no,neicnordic/experimental.neic.nordforsk.org,neicnordic/experimental.neic.nordforsk.org,neicnordic/neic.no