test(module: badge): Test Badge component, format document, fix small bug with class name

[kooliokey]

🤔 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	Fix bug where Title parameter was not being rendered.
🇨🇳 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

Base: 41.18% // Head: 41.71% // Increases project coverage by +0.52% 🎉

Coverage data is based on head (a7e9244) compared to base (9dcfb28).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2830      +/-   ##
==========================================
+ Coverage   41.18%   41.71%   +0.52%     
==========================================
  Files         544      544              
  Lines       25763    25772       +9     
  Branches      260      260              
==========================================
+ Hits        10611    10751     +140     
+ Misses      15112    14981     -131     
  Partials       40       40              

Impacted Files	Coverage Δ
components/badge/Badge.razor	95.00% <100.00%> (+95.00%)	⬆️
components/badge/Badge.razor.cs	88.88% <100.00%> (+88.88%)	⬆️
components/date-picker/DatePicker.Razor.cs	76.82% <0.00%> (-0.67%)	⬇️
components/date-picker/RangePicker.razor.cs	53.79% <0.00%> (+0.33%)	⬆️
...nts/core/Component/Overlay/OverlayTrigger.razor.cs	55.26% <0.00%> (+2.63%)	⬆️
components/core/Component/Overlay/Overlay.razor.cs	83.72% <0.00%> (+6.97%)	⬆️

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[ElderJames]

LGTM.