chore: update layout demo

[vegetalbirddd]

🤔 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

• 📌 [示例代码改造] 使用Space组件替换示例代码 #1281

💡 需求背景和解决方案

📝 更新日志

• chore: 使用Space组件替换layout示例

• 本条 PR 不需要纳入 Changelog

☑️ 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]

[uyarn]

执行下npm run test:update

[codecov-commenter]

Codecov Report

Merging #1517 (10b683e) into develop (492d477) will increase coverage by 3.69%.
The diff coverage is 83.33%.

@@             Coverage Diff             @@
##           develop    #1517      +/-   ##
===========================================
+ Coverage    57.94%   61.63%   +3.69%     
===========================================
  Files          407      655     +248     
  Lines        15371    15826     +455     
  Branches      2931     2820     -111     
===========================================
+ Hits          8907     9755     +848     
+ Misses        6187     5781     -406     
- Partials       277      290      +13     

Impacted Files	Coverage Δ
src/alert/_usage/index.vue	0.00% <ø> (ø)
src/affix/affix.tsx	40.00% <80.00%> (+0.93%)	⬆️
src/alert/_example/icon.vue	100.00% <100.00%> (ø)
src/range-input/range-input-popup-props.ts	25.00% <0.00%> (-75.00%)	⬇️
src/grid/row-props.ts	71.42% <0.00%> (-28.58%)	⬇️
src/select/util.ts	65.00% <0.00%> (-26.67%)	⬇️
src/select/props.ts	54.54% <0.00%> (-20.46%)	⬇️
src/date-picker/props.ts	53.84% <0.00%> (-16.16%)	⬇️
src/date-picker/date-range-picker-props.ts	42.85% <0.00%> (-11.69%)	⬇️
src/select/optionGroup.tsx	31.57% <0.00%> (-9.60%)	⬇️
... and 439 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.