chore: Adjust range picker style

[zombieJ]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Adjust RangePicker arrow style.
🇨🇳 Chinese	调整 RangePicker 箭头样式。

☑️ 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]

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This pull request is automatically built and testable in CodeSandbox.

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[codecov]

Codecov Report

Merging #22847 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #22847   +/-   ##
=======================================
  Coverage   98.31%   98.31%           
=======================================
  Files         361      361           
  Lines        7238     7238           
  Branches     1940     1988   +48     
=======================================
  Hits         7116     7116           
  Misses        122      122

Impacted Files	Coverage Δ
components/date-picker/generatePicker.tsx	97.16% <ø> (ø)	⬆️

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[afc163]

新箭头挺优雅