docs: update doc for align prop

[joeltaam]

中文版模板 / Chinese template

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
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🔗 Related issue link

💡 Background and solution

The documentation for rc-tooltip does not include information about the align prop.

📝 Changelog

Language	Changelog
🇺🇸 English	update doc for align prop
🇨🇳 Chinese	更新 align 属性的文档

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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👁 Visual Regression Report for PR #48705 Passed ✅

🎯 Target branch: master (84b6bab)
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All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (db17128) to head (f1237d2).
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Additional details and impacted files

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  Files          745       745           
  Lines        12947     12947           
  Branches      3383      3383           
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  Hits         12947     12947           

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