Revert "chore: upgrade Redis from v6 to v7 in middlewares" (#19960)

docker/docker-compose.yaml

@@ -595,7 +595,7 @@ services:
 
   # The redis cache.
   redis:
-    image: redis:7-alpine
+    image: redis:6-alpine
     restart: always
     environment:
       REDISCLI_AUTH: ${REDIS_PASSWORD:-difyai123456}