test_docker_daemon.py: fix syntax errors

Author: parkr

tests/checks/integration/test_docker_daemon.py

@@ -468,9 +468,9 @@ def test_labels_collection(self):
                 "collect_images_stats": True,
                 "collect_container_count": True,
                 "collect_dead_container_count": True,
-                "collect_exited_container_count": True
-                "collect_volume_count": True
-                "collect_dangling_volume_count": True
+                "collect_exited_container_count": True,
+                "collect_volume_count": True,
+                "collect_dangling_volume_count": True,
             },
             ],
         }