releases: add tidb 5.3.1 release notes (#7699)#7756

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ti-chi-bot merged 1 commit intopingcap:release-5.3from ti-chi-bot:cherry-pick-7699-to-release-5.3

Mar 3, 2022

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Commits on Mar 3, 2022

releases: add tidb 5.3.1 release notes (pingcap#7699 )

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