fix: TextArea onChange event obj

[zombieJ]

[中文版模板 / Chinese template]

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🔗 Related issue link

resolves #30117 #30115

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix TextArea onChange event return target object is not a HTMLTextArea object.
🇨🇳 Chinese	修复 TextArea onChange 事件返回 target 对象不是 HTMLTextArea 对象的问题。

☑️ 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

[github-actions]

[codecov]

Codecov Report

Merging #30124 (7032e44) into master (1794a24) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 7032e44 differs from pull request most recent head 521eb4d. Consider uploading reports for the commit 521eb4d to get more accurate results

@@            Coverage Diff            @@
##            master    #30124   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          397       397           
  Lines         7523      7523           
  Branches      2107      2107           
=========================================
  Hits          7523      7523           

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

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[github-actions]

Size Change: +45 B (0%)

Total Size: 829 kB

Filename	Size	Change
./dist/antd-with-locales.min.js	339 kB	+24 B (0%)
./dist/antd.min.js	298 kB	+21 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
./dist/antd.compact.min.css	63.8 kB	0 B
./dist/antd.dark.min.css	65 kB	0 B
./dist/antd.min.css	63.8 kB	0 B

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