Bump next (#6537)

Bumps [next](https://github.com/vercel/next.js) from 15.4.7 to 15.5.7.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.4.7...v15.5.7)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.7
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

code-samples/eventing/bookstore-sample-app/solution/frontend/package-lock.json

@@ -13,7 +13,7 @@
     "@heroicons/react": "^2.1.3",
     "@nextui-org/react": "^2.2.10",
     "framer-motion": "^11.0.22",
-    "next": "15.4.7",
+    "next": "15.5.7",
     "next-themes": "^0.3.0",
     "next-ws": "^2.1.4",
     "react": "^18",