Bump redis from 3.5.3 to 4.1.0 (#505)

Bumps [redis](https://github.com/redis/redis-py) from 3.5.3 to 4.1.0.
- [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...v4.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ git+https://github.com/python/cherry-picker.git@main#egg=cherry_picker
 aiohttp==3.8.1
 gidgethub==5.0.1
 cachetools==5.0.0
-redis==3.5.3
+redis==4.1.0
 celery==5.1.2
 sentry-sdk==1.5.1
 click==7.1.2