Move m.location thumbnail_url to be inside info to match m.video

event-schemas/schema/m.room.message#m.location

@@ -15,6 +15,9 @@ properties:
         enum:
           - m.location
         type: string
+      info:
+        type: object
+        properties:
           thumbnail_info:
             allOf:
               - $ref: core-event-schema/msgtype_infos/image_info.yaml
@@ -23,6 +26,7 @@ properties:
           thumbnail_url:
             description: The URL to a thumbnail of the location being represented.
             type: string
+        title: LocationInfo
     required:
       - msgtype
       - body