fix(module: tabs): make it possible to work without setting keys of TabPane

[ElderJames]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ 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
• Changelog is provided or not needed

[github-actions]

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 1.41%. Comparing base (a8a05e0) to head (412c051).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
components/tabs/TabPane.razor.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #4297      +/-   ##
=========================================
- Coverage    1.41%   1.41%   -0.01%     
=========================================
  Files         589     589              
  Lines       30141   30142       +1     
  Branches     5966    5967       +1     
=========================================
  Hits          428     428              
- Misses      29672   29673       +1     
  Partials       41      41              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.