Bump nuwave/lighthouse from 6.28.0 to 6.29.1 in /api (#8884)

Bumps [nuwave/lighthouse](https://github.com/nuwave/lighthouse) from 6.28.0 to 6.29.1.
- [Release notes](https://github.com/nuwave/lighthouse/releases)
- [Changelog](https://github.com/nuwave/lighthouse/blob/master/CHANGELOG.md)
- [Commits](nuwave/lighthouse@v6.28.0...v6.29.1)

---
updated-dependencies:
- dependency-name: nuwave/lighthouse
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>