[GONRG-9516] pin the compatible redis image in GC Notification

devops/gc/deploy/values.yaml

@@ -12,7 +12,7 @@ data:
   # redis connection. Change it if you want to use external redis
   redisNotificationHost: ""
   redisNotificationPort: 6379
-  redisImage: "docker.io/library/redis:7"
+  redisImage: "docker.io/library/redis:7.2-alpine"
   #Deployments
   requestsCpu: "20m"
   requestsMemory: "450Mi"