fix(element): wrong RadioGroup optionType value

[imshenshen]

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What have you changed?

对于 RadioGroupProps 的 optionType 属性值 ，组件文档、代码中都使用了 default ，但是 type RadioGroupProps 没有正确的标识 optionType

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.55%. Comparing base (4dc50bc) to head (98d5649).
Report is 2 commits behind head on formily_next.

Additional details and impacted files

@@              Coverage Diff              @@
##           formily_next    #4083   +/-   ##
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  Coverage         99.55%   99.55%           
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  Files               152      152           
  Lines              6726     6726           
  Branches           1823     1823           
=============================================
  Hits               6696     6696           
  Misses               30       30           

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[imshenshen]

@janryWang 有人review么