Fix place_point ready service

stretch_demos/nodes/place_point

@@ -102,7 +102,7 @@ class PlacePointNode(hm.HelloNode):
         self.clicked_point_sub = rospy.Subscriber('/clicked_point', PointStamped, self.clicked_point_callback)
         self.trigger_sub = rospy.Subscriber('/place_point/trigger_place_point', PointStamped, self.place_point_callback)
         self.enable_sub = rospy.Subscriber('/place_point/enable', Float32, self.enable_callback)
-        self.ready_pub = rospy.Publisher('/grasp_point/ready', Empty, queue_size=1)
+        self.ready_pub = rospy.Publisher('/place_point/ready', Empty, queue_size=1)
         self.disable_sub = rospy.Subscriber('/place_point/disable', Empty, self.disable_callback)
         self.result_pub = rospy.Publisher('/place_point/result', Empty, queue_size=1)