Bump redis from 3.5.3 to 4.6.0

Bumps [redis](https://github.com/redis/redis-py) from 3.5.3 to 4.6.0.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@3.5.3...v4.6.0)

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

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