add scheduling policy within a transaction

[llkdd1]

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What is changed, added or deleted? (Required)

Translated the last sentence of the document from ZH to EN.

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What is the related PR or file link(s)?

• This PR is translated from: add scheduling policy within a transaction docs-cn#14373
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• Delete files
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Welcome @llkdd1!

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[rpaik]

Thanks for your contribution to TiDb Docs Dash @llkdd1!

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-10 07:22:25.358263509 +0000 UTC m=+427934.942517198: ☑️ agreed by dveeden.
• 2024-01-19 03:03:22.681309313 +0000 UTC m=+497844.245607016: ☑️ agreed by hfxsd.

[qiancai]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiancai

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #16200.