style: optimize Input.TextArea count style in rtl

[xrkffgg]

[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
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Optimize the style of Input.TextArea character count in RTL mode.
🇨🇳 Chinese	优化 Input.TextArea 字数提示在 RTL 模式下的样式。

☑️ 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]

[ant-design-bot]

[codesandbox-ci]

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[github-actions]

Size Change: +45 B (0%)

Total Size: 792 kB

Filename	Size	Change
./dist/antd-with-locales.min.js	314 kB	+9 B (0%)
./dist/antd.compact.min.css	66.5 kB	+9 B (0%)
./dist/antd.dark.min.css	67.8 kB	+6 B (0%)
./dist/antd.min.css	66.5 kB	+10 B (0%)
./dist/antd.min.js	277 kB	+11 B (0%)

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[codecov]

Codecov Report

Merging #27098 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master    #27098   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          388       388           
  Lines         7423      7423           
  Branches      2029      2081   +52     
=========================================
  Hits          7423      7423           

Impacted Files	Coverage Δ
components/input/TextArea.tsx	100.00% <ø> (ø)

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