Fix level of `counts` and `devices`

They are actually within the notification object rather than the top level object. Add titles to objects so it works.

api/push-gateway/push_notifier.yaml

@@ -55,7 +55,6 @@ paths:
                   "content": {
                     "msgtype": "m.text",
                     "body": "I'm floating in a most peculiar way."
-                  }
                   },
                   "counts": {
                      "unread" : 2,
@@ -73,11 +72,14 @@ paths:
                     }
                   ]
                 }
-            required: ["notification", "counts", "devices"]
+              }
+            required: ["notification"]
             properties:
               notification:
                 type: object
+                title: Notification
                 description: Information about the push notification
+                required: ["devices"]
                 properties:
                   event_id:
                     type: string
@@ -138,6 +140,7 @@ paths:
                       event had no content field, this field is omitted.
                   counts:
                     type: object
+                    title: Counts
                     description: |-
                       This is a dictionary of the current number of unacknowledged
                       communications for the recipient user. Counts whose value is
@@ -160,6 +163,7 @@ paths:
                       This is an array of devices that the notification should be sent to.
                     items:
                       type: object
+                      title: Device
                       properties:
                         app_id:
                           type: string