update transaction doc

[you06]

Signed-off-by: you06 [email protected]

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What is changed, added or deleted? (Required)

close #6392, #6756

The transaction and isolation doc are updated.

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

• This PR is translated from:
• Other reference link(s): update transaction doc docs#6158

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• TomShawn

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[cfzjywxk]

LGTM

[ti-chi-bot]

@cfzjywxk: Thanks for your review. The bot only counts approvals from reviewers and higher roles in list, but you're still welcome to leave your comments.

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[you06]

@TomShawn can you help to review this PR?

[TomShawn]

LGTM

[TomShawn]

/remove-status LGT1
/status LGT2

[TomShawn]

/merge

[ti-chi-bot]

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

Commit hash: 7c6b95a

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #7036.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #7037.