Add note to set the deadwheel locations properly.

[cmacfarl]

In the Three Wheel Odometry section there is nothing that indicates you should set the pose of all three wheels.

https://learnroadrunner.com/dead-wheels.html#three-wheel-odometry

In particular, the Java snippet here would be a useful addition...

Image stolen from https://acme-robotics.gitbook.io/road-runner/tour/kinematics

If one does not do that, and only specifies lateral and forward distance, but not the Y-axis values then the robot will drift when running the lateral distance tuner, and display other, generally undesirable traits.