chore(deps): bump next from 15.5.10 to 16.1.5

Bumps [next](https://github.com/vercel/next.js) from 15.5.10 to 16.1.5.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.10...v16.1.5)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -12,7 +12,7 @@
     "@vercel/postgres": "^0.10.0",
     "bcryptjs": "^2.4.3",
     "jose": "^5.9.6",
-    "next": "^15.1.6",
+    "next": "^16.1.5",
     "postgres": "^3.4.8",
     "react": "^18.3.1",
     "react-dom": "^18.3.1"