fix(comp:radio): radio dot size and position shouldn't be constant

[sallerli1]

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• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
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What is the current behavior?

单选框的圆点位置是固定写死的，导致大尺寸下位置不正常

What is the new behavior?

位置改为calc百分比计算

Other information

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[codecov]

Codecov Report

Merging #1707 (0b3beb0) into main (ffd204b) will not change coverage.
Report is 2 commits behind head on main.
The diff coverage is n/a.

❗ Current head 0b3beb0 differs from pull request most recent head d092675. Consider uploading reports for the commit d092675 to get more accurate results

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  Coverage   92.54%   92.54%            
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  Files         345      345            
  Lines       32421    32421            
  Branches     3693     2713   -980     
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  Hits        30005    30005            
  Misses       2416     2416