Fixes misspelling
Fixes misspelling

Reviewers: #material_components_ios_owners, randallli

Reviewed By: #material_components_ios_owners, randallli

Projects: #material_components_ios_owners

Differential Revision: http://codereview.cc/D46

randallli/material-components-ios,samnm/material-components-ios,sigito/material-components-ios,chriscox/material-components-ios,willlarche/material-components-ios,brianjmoore/material-components-ios,willlarche/material-components-ios,samnm/material-components-ios,sigito/material-components-ios,Eccelor/material-components-ios,sigito/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,samnm/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,chriscox/material-components-ios,brianjmoore/material-components-ios,material-components/material-components-ios,sigito/material-components-ios,brianjmoore/material-components-ios,randallli/material-components-ios,material-components/material-components-ios,samnm/material-components-ios,brianjmoore/material-components-ios,willlarche/material-components-ios,chriscox/material-components-ios,Eccelor/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,Eccelor/material-components-ios,chriscox/material-components-ios,Eccelor/material-components-ios,samnm/material-components-ios,brianjmoore/material-components-ios,chriscox/material-components-ios,randallli/material-components-ios,sigito/material-components-ios,material-components/material-components-ios,randallli/material-components-ios,Eccelor/material-components-ios