ref(dep) Upgrade MUI (#12089)

react/features/prejoin/components/DropdownButton.tsx

@@ -1,4 +1,5 @@
-import { withStyles } from '@material-ui/styles';
+import { Theme } from '@mui/material';
+import { withStyles } from '@mui/styles';
 import React from 'react';
 
 import Icon from '../../base/icons/components/Icon';
@@ -43,7 +44,7 @@ type Props = {
  *
  * @returns {Object}
  */
-const styles = (theme: any) => {
+const styles = (theme: Theme) => {
     return {
         prejoinPreviewDropdownBtn: {
             alignItems: 'center',
@@ -53,10 +54,10 @@ const styles = (theme: any) => {
             height: 40,
             fontSize: 15,
             lineHeight: '24px',
-            padding: '0 16px',
+            padding: '0 16px', // @ts-ignore
             backgroundColor: theme.palette.field02,
 
-            '&:hover': {
+            '&:hover': { // @ts-ignore
                 backgroundColor: theme.palette.field02Hover
             }
         },