Adapt components to new mui & nextjs versions

components/rezo/kat-rezo-nou.js

@@ -4,7 +4,7 @@ import Card from '@mui/material/Card'
 import CardContent from '@mui/material/CardContent'
 import CardActionArea from '@mui/material/CardActionArea'
 import Divider from '@mui/material/Divider'
-import Grid from '@mui/material/Grid'
+import Grid from '@mui/material/Unstable_Grid2'
 
 import Typography from '@mui/material/Typography'
 import {CardMedia} from '@mui/material'
@@ -20,7 +20,7 @@ export default function KatRezoNou({tit, img, soutit, ko, lyen}) {
 
   return (
     <>
-      <Grid item xs={12} md={6} sx={{marginBottom: 2}}>
+      <Grid xs={12} md={6} sx={{marginBottom: 2}}>
         <Card raised>
           <CardActionArea onClick={handleClickOpen}>
             <CardMedia