fix: change object-fit of UploadList to contain

[JuniorTour]

[中文版模板 / Chinese template]

🤔 This is a ...

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

Fix #27190

💡 Background and solution

Before:

After:

📝 Changelog

Language	Changelog
🇺🇸 English	feat: change object-fit of UploadList to contain
🇨🇳 Chinese	修复 Upload.List 图片预览显示不全的问题。

☑️ 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 #27312 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master    #27312   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          389       389           
  Lines         7389      7389           
  Branches      2074      2067    -7     
=========================================
  Hits          7389      7389           

Impacted Files	Coverage Δ
components/upload/utils.tsx	100.00% <100.00%> (ø)

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