Build(deps): bump mercurius from 14.1.0 to 15.1.0

Bumps [mercurius](https://github.com/mercurius-js/mercurius) from 14.1.0 to 15.1.0.
- [Release notes](https://github.com/mercurius-js/mercurius/releases)
- [Commits](mercurius-js/mercurius@v14.1.0...v15.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>