fix(deps): update material-ui monorepo to v7

Author: renovate[bot]

frontends/main/package.json

@@ -16,8 +16,8 @@
     "@mitodl/course-search-utils": "^3.5.0",
     "@mitodl/mitxonline-api-axios": "^2026.1.12",
     "@mitodl/smoot-design": "^6.19.0",
-    "@mui/material": "^6.4.5",
-    "@mui/material-nextjs": "^6.4.3",
+    "@mui/material": "^7.0.0",
+    "@mui/material-nextjs": "^7.0.0",
     "@next/bundle-analyzer": "^14.2.15",
     "@react-pdf/renderer": "^4.3.0",
     "@remixicon/react": "^4.2.0",

frontends/ol-components/package.json

@@ -23,9 +23,9 @@
     "@floating-ui/react": "^0.27.16",
     "@mui/base": "5.0.0-beta.70",
     "@mui/lab": "6.0.0-dev.240424162023-9968b4889d",
-    "@mui/material": "^6.4.5",
-    "@mui/material-nextjs": "^6.4.3",
-    "@mui/system": "^6.4.3",
+    "@mui/material": "^7.0.0",
+    "@mui/material-nextjs": "^7.0.0",
+    "@mui/system": "^7.0.0",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-popover": "^1.1.15",
     "@remixicon/react": "^4.2.0",