hub-docs

f18db2a8 - arrow files are supported (#1225)

arrow files are supported (#1225) * arrow files are supported * Update docs/hub/datasets-adding.md Co-authored-by: Quentin Lhoest <42851186+lhoestq@users.noreply.github.com> --------- Co-authored-by: Quentin Lhoest <42851186+lhoestq@users.noreply.github.com>