chore(legacy): bump peer dependency

[kingyue737]

Description

As plugin-legacy v3 is for vite v4, I think we should also bump the peer dependency.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
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[patak-cat]

thanks @kingyue737, sorry missed this PR, already updated it here #11278