Color point cloud type maybe has wrong

[yuetin]

https://github.com/orbbec/OrbbecSDK_ROS1/blob/2385c916dcb5c1a3eae1891f5981bc20d638687f/src/ob_camera_node.cpp#L557-L558

I think here should be UINT32 cloud_msg_.point_step = addPointField(cloud_msg_, format_str, 1, sensor_msgs::PointField::UINT32, static_cast<int>(cloud_msg_.point_step));