Fix Typo in `MenuItem.tsx`

[MonkeyKing44]

Fix Typo in MenuItem.tsx

Description

This pull request corrects a minor typo in the MenuItem.tsx file, ensuring the code adheres to proper standards and avoids potential styling issues.

Before:

• appearence

After:

• appearance

References (if applicable)

• N/A

Checklist

• [x] Typo corrected in MenuItem.tsx
• [ ] Documentation updated (if applicable)

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