使用el-radio-group时，内部选项默认选中了

参考文章链接
原来写的是：

<el-col :span="24">
  <el-form-item label="状态" prop="transportType">
    <el-radio-group v-model="state.editData.transportType">
      <el-radio :value="1">预售配送</el-radio>
      <el-radio :value="2">团购自提</el-radio>
    </el-radio-group>
  </el-form-item>
</el-col>

改成了

<el-col :span="24">
  <el-form-item label="状态" prop="transportType">
    <el-radio-group v-model="state.editData.transportType">
      <el-radio :label="1">预售配送</el-radio>
      <el-radio :label="2">团购自提</el-radio>
    </el-radio-group>
  </el-form-item>
</el-col>