docs: lock dumi to 2.3 alpha

[PeachScript]

[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
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

#46805

💡 Background and solution

Lock dumi to 2.3 alpha version to avoid base branches build failed, wait for #46805 merged.

📝 Changelog

Language	Changelog
🇺🇸 English	--
🇨🇳 Chinese	--

☑️ 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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[github-actions]

[github-actions]

Visual Regression Report for PR #46806 Passed ✅

Target branch: master (f195438)

---

Congrats! No visual-regression diff found

[socket-security]

Updated dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
dumi	2.3.0-beta.0...2.3.0-alpha.9	environment	+0/-1	2.57 MB	peachscript

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