add missing low_priority queue

Author: wannevancamp

compose.yml

@@ -70,7 +70,7 @@ services:
     depends_on:
       init:
         condition: service_completed_successfully
-    entrypoint: [ "php", "bin/console", "messenger:consume", "async", "--time-limit=300", "--memory-limit=512M" ]
+    entrypoint: [ "php", "bin/console", "messenger:consume", "async low_priority", "--time-limit=300", "--memory-limit=512M" ]
     deploy:
       replicas: 3