fix(deps): update nextjs monorepo to v15

Author: renovate[bot]

dashboard/package.json

@@ -15,15 +15,15 @@
     "@mui/icons-material": "^5.8.4",
     "@mui/material": "^5.8.4",
     "@nextui-org/react": "1.0.0-beta.9",
-    "next": "12.2.4",
+    "next": "15.2.3",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },
   "devDependencies": {
     "@types/node": "17.0.41",
     "@types/react": "18.0.16",
     "eslint": "8.19.0",
-    "eslint-config-next": "12.2.4",
+    "eslint-config-next": "15.2.3",
     "typescript": "4.7.4"
   }
 }