chore(deps): bump next from 13.4.7 to 14.2.32 in /backend

Bumps [next](https://github.com/vercel/next.js) from 13.4.7 to 14.2.32.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v13.4.7...v14.2.32)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 14.2.32
  dependency-type: direct:production
...

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

Author: dependabot[bot]

backend/package-lock.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "autoprefixer": "10.4.14",
-    "next": "13.4.7",
+    "next": "14.2.32",
     "postcss": "8.4.24",
     "react": "18.2.0",
     "react-dom": "18.2.0",