Update backup-and-restore-use-cases.md (#4221)
Update backup-and-restore-use-cases.md (#4221)

Specify NIC

Co-authored-by: TomShawn <3d0966147538bc5ab020e8dffa2c0b746f9728a6@users.noreply.github.com>
pingcap/docs,pingcap/docs,pingcap/docs