docs: Update index.en-US.md

[geekreflex]

Fixed typo

中文版模板 / Chinese template

🤔 This is a ...

• [ ] New feature
• [ ] Bug fix
• [x] Site / documentation update
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• [ ] Component style update
• [ ] TypeScript definition update
• [ ] Bundle size optimization
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📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

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