Bump next from 15.5.4 to 16.0.0

Bumps [next](https://github.com/vercel/next.js) from 15.5.4 to 16.0.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/compare/v15.5.4...v16.0.0)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "chart.js": "^4.5.0",
     "mongodb": "^6.17.0",
-    "next": "15.5.4",
+    "next": "16.0.1",
     "next-auth": "^4.24.11",
     "react": "^19.0.0",
     "react-chartjs-2": "^5.3.0",