Bump django-celery-beat from 2.2.1 to 2.3.0
Bumps [django-celery-beat](https://github.com/celery/django-celery-beat) from 2.2.1 to 2.3.0.
- [Release notes](https://github.com/celery/django-celery-beat/releases)
- [Changelog](https://github.com/celery/django-celery-beat/blob/master/Changelog)
- [Commits](https://github.com/celery/django-celery-beat/compare/v2.2.1...v2.3.0)
---
updated-dependencies:
- dependency-name: django-celery-beat
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>