build(deps): bump generator-jhipster from 7.9.4 to 8.1.0

Bumps [generator-jhipster](https://github.com/jhipster/generator-jhipster) from 7.9.4 to 8.1.0.
- [Release notes](https://github.com/jhipster/generator-jhipster/releases)
- [Commits](jhipster/generator-jhipster@v7.9.4...v8.1.0)

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

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