Update v3.0/tidb-in-kubernetes/deploy/prerequisites.md
Update v3.0/tidb-in-kubernetes/deploy/prerequisites.md

Co-Authored-By: TomShawn <3d0966147538bc5ab020e8dffa2c0b746f9728a6@users.noreply.github.com>
pingcap/docs-cn,pingcap/docs-cn