fix: error when target not an html element

[bcd337]

fix error when target is object but not an html element

[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
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• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix BackTop/Anchor throws error when target don't return a html element.
🇨🇳 Chinese	修复 BackTop/Anchor target 不是 html 元素时会出错问题。

☑️ 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
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[github-actions]

[codecov]

Codecov Report

Merging #29523 (a0da33d) into master (4d3b2d8) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master    #29523   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          394       394           
  Lines         7480      7480           
  Branches      2106      2106           
=========================================
  Hits          7480      7480           

Impacted Files	Coverage Δ
components/_util/getScroll.tsx	100.00% <100.00%> (ø)

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