Bump next from 15.1.5 to 15.2.3

Bumps [next](https://github.com/vercel/next.js) from 15.1.5 to 15.2.3.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.5...v15.2.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

examples/nextjs/package.json

@@ -13,7 +13,7 @@
     "@xennis/react-notion-cms-fetch": "workspace:*",
     "@xennis/react-notion-cms-render": "workspace:*",
     "highlight.js": "^11.11.1",
-    "next": "15.1.5",
+    "next": "15.2.3",
     "prismjs": "^1.30.0",
     "react": "19.0.0",
     "react-dom": "19.0.0"