fix(module: Modal): centered conflict maximizable style

[zxyao145]

🤔 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

#3401

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	fix: centered conflict maximizable style
🇨🇳 Chinese	修复 centered 和 maximizable 样式冲突

☑️ 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

Patch coverage has no change and project coverage change: +1.45% 🎉

Comparison is base (b5df6d5) 45.41% compared to head (e150c1e) 46.86%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3403      +/-   ##
==========================================
+ Coverage   45.41%   46.86%   +1.45%     
==========================================
  Files         558      558              
  Lines       26853    26843      -10     
  Branches      268      268              
==========================================
+ Hits        12194    12580     +386     
+ Misses      14619    14223     -396     
  Partials       40       40              

Files Changed	Coverage Δ
components/modal/config/DialogOptions.cs	0.00% <0.00%> (ø)
components/modal/core/Dialog.razor	0.00% <0.00%> (ø)
components/modal/core/Dialog.razor.cs	0.00% <0.00%> (ø)
components/notification/Notification.razor.cs	0.00% <0.00%> (ø)

... and 24 files with indirect coverage changes

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