build(deps): bump next in /Frontend in the nextjs-frontend group

Bumps the nextjs-frontend group in /Frontend with 1 update: [next](https://github.com/vercel/next.js).


Updates `next` from 15.4.6 to 16.3.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Commits](vercel/next.js@v15.4.6...v16.3.1)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.3.1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs-frontend
...

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

Author: dependabot[bot]