Bump next from 15.5.7 to 16.1.1 in the next group (#13578)

* Bump next from 15.5.7 to 16.1.1 in the next group

Bumps the next group with 1 update: [next](https://github.com/vercel/next.js).


Updates `next` from 15.5.7 to 16.1.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.7...v16.1.1)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: next
...

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

* Add `--webpack` flag

* Remove `sharp` version pinning

* Remove now unneeded `npmAuditIgnoreAdvisories`

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Aaron Moore <aaron.moore@bbc.co.uk>

Author: dependabot[bot]