Update redis requirement from <=4.3.4 to <=6.4.0

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@2.4.6...v6.4.0)

---
updated-dependencies:
- dependency-name: redis
  dependency-version: 6.4.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
   'pydantic==2.9.2',  # Pin to specific working version
   'pydantic_core==2.23.4',  # Pin to specific working version  
   'python-dateutil<=2.8.2',
-  'redis<=4.3.4',
+  'redis<=6.4.0',
   # selenium 4.0 breaks with arm geckodriver.
   'selenium==3.141.0',
   'setuptools-rust<=1.5.2',