⬆️ Bump next from 14.2.13 to 14.2.15 in /apps/sample

Bumps [next](https://github.com/vercel/next.js) from 14.2.13 to 14.2.15.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.13...v14.2.15)

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

Signed-off-by: dependabot[bot] <[email protected]>

apps/sample/package.json

@@ -29,7 +29,7 @@
     "@playwright/test": "^1.49.0",
     "@sentry/nextjs": "^8.42.0",
     "ethers": "6.13.4",
-    "next": "14.2.13",
+    "next": "14.2.15",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-lottie": "^1.2.10",