demo(pkg): Fix next to version that works with stackblitz

Author: ntucker

.github/renovate.json

@@ -11,6 +11,7 @@
     "downlevel-dts",
     "@types/lodash",
     "nock",
+    "next",
     "rollup-plugin-dts"
   ],
   "timezone": "America/Chicago",

examples/nextjs/package-lock.json

@@ -27,7 +27,7 @@
     "@types/react-dom": "19.2.3",
     "clsx": "^2.1.1",
     "core-js": "^3.40.0",
-    "next": "15.5.9",
+    "next": "^15.4.10",
     "react": "19.2.3",
     "react-dom": "19.2.3",
     "tar-fs": "^3.0.6",