chore(deps): bump next in /examples/openapi-ts-next

Bumps [next](https://github.com/vercel/next.js) from 15.1.6 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@v15.1.6...v15.2.3)

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

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

Author: dependabot[bot]

examples/openapi-ts-next/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@hey-api/client-next": "workspace:*",
-    "next": "15.1.6",
+    "next": "15.2.3",
     "react": "19.0.0",
     "react-dom": "19.0.0"
   },