Updating voice_nav.py in pocketsphinx to fix Turtlebot2 issue

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I noticed an issue with the voice control example, voice_nav.py, in pocketsphinx. I'm new to ROS and don't know who to tell to suggest a fix. Could someone tell me how to go about notifying someone about this issue?

Here is the issue as I understand it. In pocketsphinx, voice_nav.py publishes on the /cmd_vel topic to move the robot. I think this works fine for the original turtlebot, but the turtlebot2 with a Kobuki base needs this published on /cmd_vel_mux/input/navi topic.

To get the pocketsphinx samples running on my turltebot2, I had to change line 44 of voice_nav.py from

self.cmd_vel_pub = rospy.Publisher('cmd_vel', Twist, queue_size=5)

to

self.cmd_vel_pub = rospy.Publisher('cmd_vel_mux/input/navi', Twist, queue_size=5)

But I think this fixes it for the turtlebot2, but breaks it for the original turtlebot.

So, how do I go about notifying someone of this issue?