[zh-cn] sync /docs/concepts/storage/volumes.md

[qlijin]

Sync file:

/docs/concepts/storage/volumes.md

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[tengqm]

/lgtm

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LGTM label has been added.

Git tree hash: 65446741c599e57108cca56b7e769d4fb2690da0

[howieyuen]

/approve

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