switch from material ui to mui as the rjsf team now supports it

[mishraomp]

https://github.com/rjsf-team/react-jsonschema-form/tree/main/packages/mui

[DerekRoberts]

https://mui.com/material-ui/migration/migration-v4/

[DerekRoberts]

Blocking #281 (comment)