[docs] Migration guide to v4: include change to dense Lists (#17074)
[docs] Migration guide to v4: include change to dense Lists (#17074)


callemall/material-ui,kybarg/material-ui,callemall/material-ui,mui-org/material-ui,mbrookes/material-ui,oliviertassinari/material-ui,mui-org/material-ui,mui-org/material-ui,oliviertassinari/material-ui,mbrookes/material-ui,mbrookes/material-ui,kybarg/material-ui,kybarg/material-ui,rscnt/material-ui,lgollut/material-ui,rscnt/material-ui,rscnt/material-ui,callemall/material-ui,kybarg/material-ui,callemall/material-ui,oliviertassinari/material-ui