Bump celery[redis] from 4.4.5 to 4.4.6
Bump celery[redis] from 4.4.5 to 4.4.6

Bumps [celery[redis]](https://github.com/celery/celery) from 4.4.5 to 4.4.6.
- [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/v4.4.5...v4.4.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
gpodder/mygpo,gpodder/mygpo,gpodder/mygpo,gpodder/mygpo