fix: Select multiple selection margin

[zombieJ]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
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🔗 Related issue link

fix #21163

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Select multiple item spacing style.
🇨🇳 Chinese

☑️ Self Check before Merge

• 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]

[codecov]

Codecov Report

Merging #21175 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #21175   +/-   ##
=======================================
  Coverage   97.45%   97.45%           
=======================================
  Files         296      296           
  Lines        6912     6912           
  Branches     1871     1871           
=======================================
  Hits         6736     6736           
  Misses        176      176

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