fix typo "excute" (#22665)

[ti-chi-bot]

This is an automated cherry-pick of #22665

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• This PR is translated from: fix typo "excute" docs-cn#21488
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[Oreoxmt]

/approve

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[gemini-code-assist]

Code Review

This pull request corrects a spelling error in the optimistic-transaction.md file, changing "excute" to "execute" within a sequence diagram. I have no feedback to provide.