fix: switch checkedChildren no height

[wanpan11]

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

close #48503

💡 Background and solution

switch 组件 checkedChildren unCheckedChildren 没有默认高度
checkedChildren 为空时会造成 unCheckedChildren 定位错误

📝 Changelog

Language	Changelog
🇺🇸 English	switch component props checkedChildren unCheckedChildren add min-height
🇨🇳 Chinese	switch 组件 checkedChildren unCheckedChildren 添加 min-height

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

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
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[github-actions]

[github-actions]

👁 Visual Regression Report for PR #48513 Passed ✅

🎯 Target branch: master (d524a4c)
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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d524a4c) to head (ba4ac3f).

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #48513   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          744       744           
  Lines        12883     12883           
  Branches      3369      3369           
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  Hits         12883     12883           

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