Bump redis from 3.5.3 to 5.0.7 in /requirements

Bumps [redis](https://github.com/redis/redis-py) from 3.5.3 to 5.0.7.
- [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...v5.0.7)

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

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

requirements/prod.txt

@@ -2,5 +2,5 @@
 django-pylibmc==0.6.1
 django-redis-cache==3.0.1
 pylibmc==1.6.1
-redis==3.5.3
+redis==5.0.7
 sentry-sdk==1.44.1