update react, material

Change-Id: I4ae3cdf25982f0935641bf5846447e9d223563b4
diff --git a/client/src/components/MessageList.js b/client/src/components/MessageList.js
index 175f19b..3ae1b1c 100644
--- a/client/src/components/MessageList.js
+++ b/client/src/components/MessageList.js
@@ -1,6 +1,6 @@
 import Message from './Message'
 import React, { useEffect } from 'react'
-import { Box, Divider, Typography } from '@material-ui/core'
+import { Box, Divider, Typography } from '@mui/material'
 import ConversationAvatar from './ConversationAvatar'
 
 export default function MessageList(props) {