Bump celery from 4.4.1 to 4.4.2
Bump celery from 4.4.1 to 4.4.2

Bumps [celery](https://github.com/celery/celery) from 4.4.1 to 4.4.2.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/master/Changelog.rst)
- [Commits](https://github.com/celery/celery/compare/4.4.1...4.4.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Meisterschueler/ogn-python,Meisterschueler/ogn-python,glidernet/ogn-python,glidernet/ogn-python,Meisterschueler/ogn-python,Meisterschueler/ogn-python,glidernet/ogn-python,glidernet/ogn-python