Merge pull request #4132 from django-oscar/dependabot/pip/django-redis-gte-4.12-and-lt-5.4

Update django-redis requirement from <5.3,>=4.12 to >=4.12,<5.4

requirements.txt

 # Sandbox
 Whoosh>=2.7,<2.8
 django-environ>=0.4,<0.11
-django-redis>=4.12,<5.3
+django-redis>=4.12,<5.4
 pysolr>=3.9,<3.10
 redis>=3.5,<5.1
 requests>=2.25,<3