fix: update message content with a unique key and cancel manually

[Aemple]

🤔 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

#18678

💡 Background and solution

close #19950

📝 Changelog

Language	Changelog
🇺🇸 English	repair update message content with a unique key can‘t cancel manually
🇨🇳 Chinese	修复message组件使用key时无法手动取消的情况

☑️ 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

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View rendered components/message/demo/update.md

[tests-checker]

Could you please add tests to make sure this change works as expected?

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[codecov]

Codecov Report

Merging #19967 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #19967      +/-   ##
==========================================
- Coverage    97.8%    97.8%   -0.01%     
==========================================
  Files         284      284              
  Lines        7707     7706       -1     
  Branches     2169     2155      -14     
==========================================
- Hits         7538     7537       -1     
  Misses        169      169

Impacted Files	Coverage Δ
components/message/index.tsx	94.2% <100%> (-0.09%)	⬇️

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