fix typo: relaod -> reload (#6235)#6262

ti-chi-bot merged 2 commits into

pingcap:release-4.0pingcap/docs:release-4.0from

ti-chi-bot:cherry-pick-6235-to-release-4.0ti-chi-bot/docs:cherry-pick-6235-to-release-4.0Copy head branch name to clipboard