Update redis requirement from ~=5.2.0 to >=5.2,<7.1

Updates the requirements on [redis](https://github.com/redis/redis-py) to permit the latest version.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v5.2.0...v7.0.0)

---
updated-dependencies:
- dependency-name: redis
  dependency-version: 7.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -74,7 +74,7 @@ dependencies = [
 
 [project.optional-dependencies]
 postgres = ["psycopg2-binary~=2.9.0"]
-redis = ["redis~=5.2.0"]
+redis = ["redis>=5.2,<7.1"]
 memcached = ["pylibmc"]
 
 [project.urls]