fix(Grid): change default value of wrap to false to match the documentation

[Aaron-zon]

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wrap的类型为Boolean，但默认值为undefined。 测试时发现由于用wrap做判断设置是否自动换行时使用的是wrap === false，因此值为undefined时得到的结果是自动换行 ，等同于默认设置了wrap=true。 现将默认值从undefined改为false，修复默认值，同时与文档保持一致。

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修改后：

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[Aaron-zon]

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[github-actions[bot]]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days