fix: fix steps/popup bug

[k1nz]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

#753

💡 需求背景和解决方案

修复 Steps issue #753
补充 Popup v-model:visible
补充 Steps Demo

📝 更新日志

• fix(Steps): 修复 readonly 不起作用的问题

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[github-actions]

[PengYYYYY]

icon 包更新了，你本地装一下

[PengYYYYY]

#759 受这个PR影响需要处理一下

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (develop@a1071c5). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff             @@
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  Coverage           ?   61.50%           
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  Files              ?      404           
  Lines              ?    14145           
  Branches           ?     2701           
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  Hits               ?     8700           
  Misses             ?     5190           
  Partials           ?      255           

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