Bump next from 13.5.6 to 14.2.15 in /docs

Bumps [next](https://github.com/vercel/next.js) from 13.5.6 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@v13.5.6...v14.2.15)

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

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

docs/package.json

@@ -24,7 +24,7 @@
     "eslint-config-next": "13.5.6",
     "lucide-react": "^0.221.0",
     "mdast-util-toc": "^6.1.1",
-    "next": "13.5.6",
+    "next": "14.2.15",
     "next-contentlayer": "^0.3.2",
     "next-sitemap": "workspace:*",
     "next-themes": "^0.2.1",