Change the cache from memcache to redis in the task as well as it is …

…in the util function itself (#2263)

cms/tasks.py

@@ -2,7 +2,7 @@
 from urllib.parse import urljoin, urlparse
 
 import requests
-from django.core.cache import cache
+from django.core.cache import caches
 from mitol.common.decorators import single_task
 
 from cms.api import create_featured_items
@@ -105,13 +105,14 @@ def queue_fastly_full_purge():
 @single_task(10)
 def refresh_featured_homepage_items():
     """
-    Refresh the featured homepage items in the memcached cache.
+    Refresh the featured homepage items in the redis cache.
     """
     logger = logging.getLogger("refresh_featured_homepage_items__task")
     logger.info("Refreshing featured homepage items...")
     # if the key is not found, the ttl will be 0 per their docs
     # https://github.com/jazzband/django-redis?tab=readme-ov-file#get-ttl-time-to-live-from-key
-    if cache.ttl("CMS_homepage_featured_courses") > (10 * ONE_MINUTE):
+    redis_cache = caches["redis"]
+    if redis_cache.ttl("CMS_homepage_featured_courses") > (10 * ONE_MINUTE):
         logger.info("Featured courses found in cache, moving on")
         return
     logger.info("No featured courses found in cache, refreshing")