chore(deps): update material-ui monorepo to v9

Author: renovate[bot]

package.json

@@ -42,10 +42,10 @@
     "@emotion/styled": "11.14.1",
     "@mdx-js/loader": "3.1.1",
     "@mdx-js/react": "3.1.1",
-    "@mui/icons-material": "7.3.6",
+    "@mui/icons-material": "9.0.0",
     "@mui/lab": "7.0.1-beta.20",
-    "@mui/material": "7.3.6",
-    "@mui/material-nextjs": "7.3.6",
+    "@mui/material": "9.0.0",
+    "@mui/material-nextjs": "9.0.0",
     "@next/mdx": "15.5.9",
     "@rjsf/core": "6.1.2",
     "@rjsf/mui": "6.1.2",