Update backup-and-restore-storages.md (#5772)

[ti-srebot]

cherry-pick #5772 to release-4.0
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使用 lightning 导入 s3上的数据时，如果使用的是endpoint 进行区分，需要进行force-path-style参数的设置。

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@TomShawn you're already a collaborator in bot's repo.

[TomShawn]

/lgtm

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[TomShawn]

/merge

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Commit hash: 2b84910