Update docs/datasets.md
Update docs/datasets.md

Co-authored-by: Philipp Otto <d6a330e0028e11926ca266e6abd80c349ed7920f@users.noreply.github.com>
scalableminds/webknossos,scalableminds/webknossos,scalableminds/webknossos,scalableminds/webknossos,scalableminds/webknossos,scalableminds/webknossos