feat(deps): bump jiti to v2

[chenjiahan]

Summary

Bump jiti from v1 to v2 to support top level await and import.meta.dirname.

Related Links

• [Feature]: Support for using import.meta.dirname in rsbuild.config.ts #3931
• https://github.com/unjs/jiti/releases/tag/v2.0.0
• chore(deps): update dependency jiti to ^2.4.1 #4139

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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