Update redis[hiredis] requirement from <7,>=5.2.1 to >=5.2.1,<8

Updates the requirements on [redis[hiredis]](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@v5.2.1...v7.3.0)

---
updated-dependencies:
- dependency-name: redis[hiredis]
  dependency-version: 7.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -3,4 +3,4 @@ argon2-cffi>=25.1,<26
 granian>=2.5,<3
 openpyxl>=3.1.5,<3.2
 psycopg[binary,pool]>=3.2.6,<3.3
-redis[hiredis]>=5.2.1,<7
+redis[hiredis]>=5.2.1,<8