chore(deps): update dependency next to v15

Author: renovate[bot]

examples/with-app-router-context/package.json

@@ -14,7 +14,7 @@
     "@types/react-dom": "18.3.5",
     "eslint": "9.23.0",
     "eslint-config-next": "15.2.4",
-    "next": "14.2.26",
+    "next": "15.3.2",
     "next-runtime-env": "link:../..",
     "react": "18.3.1",
     "react-dom": "18.3.1",