translations are in crowdin

Author: oliviertassinari

docs/src/pages/components/icons/icons-zh.md

@@ -309,7 +309,7 @@ import SvgIcon from '@material-ui/core/SvgIcon';
 
 ```jsx
 import Icon from '@material-ui/core/Icon';
-import { visuallyHidden } from '@material-ui/utils';
+import { visuallyHidden } from '@material-ui/system';
 import { makeStyles } from '@material-ui/core/styles';
 
 const classes = makeStyles({ visuallyHidden })();