vercel configs corrected

vercel.json

@@ -9,12 +9,15 @@
       "destination": "https://plausible.io/api/event"
     }
   ],
-  "routes": [
+  "headers": [
     {
-      "src": "/_nuxt/.+",
-      "headers": {
-        "cache-control": "public, max-age=31536000, immutable"
-      }
+      "source": "/_nuxt/(.*)",
+      "headers": [
+        {
+          "key": "cache-control",
+          "value": "public, max-age=31536000, immutable"
+        }
+      ]
     }
   ]
 }