fix: update cache handler based on official example (#2805)

Co-authored-by: Piyush Gupta <piyushguptaa2z123@gmail.com>

.env.example

@@ -176,7 +176,7 @@ ENTERPRISE_LICENSE_KEY=
 UNSPLASH_ACCESS_KEY=
 
 # The below is used for Next Caching (uses In-Memory from Next Cache if not provided)
-# REDIS_URL:
+# REDIS_URL=redis://localhost:6379
 
 # The below is used for Rate Limiting (uses In-Memory LRU Cache if not provided) (You can use a service like Webdis for this)
-# REDIS_HTTP_URL:
+# REDIS_HTTP_URL=