npm(deps): bump next from 15.5.9 to 16.2.12

Bumps [next](https://github.com/vercel/next.js) from 15.5.9 to 16.2.12.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Commits](vercel/next.js@v15.5.9...v16.2.12)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.2.12
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]