fix(deps): downgrade nextjs (#1200)

Author: waleedlatif1

apps/sim/package.json

@@ -98,7 +98,7 @@
     "lucide-react": "^0.479.0",
     "mammoth": "^1.9.0",
     "mysql2": "3.14.3",
-    "next": "^15.3.2",
+    "next": "^15.4.1",
     "next-runtime-env": "3.3.0",
     "next-themes": "^0.4.6",
     "openai": "^4.91.1",
@@ -160,5 +160,9 @@
     "canvas",
     "better-sqlite3",
     "sharp"
-  ]
+  ],
+  "overrides": {
+    "next": "^15.4.1",
+    "@next/env": "^15.4.1"
+  }
 }