[docs][grid] Incorrect `direction` prop description

[mogrady88]

Related page

https://mui.com/material-ui/api/grid/#props

Kind of issue

Unclear explanations

Issue description

Grid direction prop is listed in the PropsAPI but the Migration Guide says its not valid

Context

Im confused on the direction prop for Grid/GridLegacy. Your Migration Guide tells us that its not valid but then I see it listed in the PropsAPI. Which one is correct?

Search keywords: Grid Direction Prop