Update Themer examples to use non-deleted themer (#9245)
Update Themer examples to use non-deleted themer (#9245)

Updates the Themer Examples section to reference a Themer class that has not yet been deleted.
material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios