statement summary: fix typo in statement-summary (#6794)#6795

ti-chi-bot merged 2 commits into

pingcap:release-5.1pingcap/docs-cn:release-5.1from

ti-chi-bot:cherry-pick-6794-to-release-5.1ti-chi-bot/docs-cn:cherry-pick-6794-to-release-5.1Copy head branch name to clipboard