Bump redis from 4.6.0 to 5.0.0

Bumps [redis](https://github.com/redis/redis-py) from 4.6.0 to 5.0.0.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v4.6.0...v5.0.0)

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

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

requirements.txt

@@ -3,7 +3,7 @@ git+https://github.com/python/cherry-picker.git@main#egg=cherry_picker
 aiohttp==3.8.5
 gidgethub==5.3.0
 cachetools==5.3.1
-redis==4.6.0
+redis==5.0.0
 celery==5.3.1
 sentry-sdk==1.30.0
 click==8.1.6