Clarify wording in BR tool doc  (#3810)
Clarify wording in BR tool doc  (#3810)

* Update backup-and-restore-tool.md

* Update br/backup-and-restore-tool.md

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

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