Update upgrade-tidb-using-tiup.md (#5989)
Update upgrade-tidb-using-tiup.md (#5989)

* Update upgrade-tidb-using-tiup.md

* Update upgrade-tidb-using-tiup.md

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

* add a blank line

* trigger ci

Co-authored-by: TomShawn <3d0966147538bc5ab020e8dffa2c0b746f9728a6@users.noreply.github.com>
Co-authored-by: Coco Yee <4b13e11d5beb5669a80650bc9e0535372af5b679@users.noreply.github.com>
pingcap/docs-cn,pingcap/docs-cn