🐛 [Bug]: Grid组件文档问题

[xingyan95]

Version

v1.0.0-beta.12

Vue Version

3.1.1

Link to minimal reproduction

https://vue-devui.github.io/components/grid/

Step to reproduce

【对齐】demo中，文案与实际展示的效果不符。

What is expected

文案应修改为：Justify start。

What is actually happening

No response

Any additional comments (optional)

No response

[kagol]

fixed by @ming-bin on #123