chore(deps): bump next from 15.2.4 to 15.4.7 in /examples/nextjs (#10091)

Bumps [next](https://github.com/vercel/next.js) from 15.2.4 to 15.4.7.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.2.4...v15.4.7)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/nextjs/package.json

@@ -17,7 +17,7 @@
     "@contentful/f36-components": "4.45.0",
     "@contentful/f36-tokens": "4.0.2",
     "@contentful/react-apps-toolkit": "1.2.16",
-    "next": "15.2.4",
+    "next": "15.4.7",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },