ticdc: update the warning for using redo log (#11182)

[ti-chi-bot]

This is an automated cherry-pick of #11182

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[ti-chi-bot]

[REVIEW NOTIFICATION]

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• shichun-0415

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[shichun-0415]

/verify

[shichun-0415]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

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Commit hash: 0e353df