fix vercel config for Next.js 16

vercel.json

@@ -1,18 +1,9 @@
 {
   "version": 2,
-  "framework": "nextjs",
+  "builds": [
-  "routes": [
     {
-      "src": "/_next/(.*)",
+      "src": "package.json",
-      "dest": "/_next/$1"
+      "use": "@vercel/next"
-    },
-    {
-      "src": "/favicon.ico",
-      "dest": "/favicon.ico"
-    },
-    {
-      "src": "/(.*)",
-      "dest": "/$1"
     }
   ]
 }