fix: 🌑 Dropdown dark menu color

[afc163]

[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
• Perfermance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

#24702 (comment)

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	same as #24702
🇨🇳 Chinese	same as #24702

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• 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

[ant-design-bot]

[ant-design-bot]

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[codecov]

Codecov Report

Merging #24707 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #24707   +/-   ##
=======================================
  Coverage   99.21%   99.21%           
=======================================
  Files         365      365           
  Lines        7274     7274           
  Branches     1979     2029   +50     
=======================================
  Hits         7217     7217           
  Misses         57       57           

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