docs(toolbar): Fixes demo link.
docs(toolbar): Fixes demo link.

pgbross/material-components-web,anton-kachurin/material-components-web,pgbross/material-components-web,material-components/material-components-web,anton-kachurin/material-components-web,material-components/material-components-web,material-components/material-components-web,Yizhachok/material-components-web,Yizhachok/material-components-web