A small error in robotics-toolbox-python/roboticstoolbox/tools/p_servo.py

[waelbachta]

Hello,

First at all, I would like to thank you for this very helpful toolbox that make robotics teaching easier.

I noticed a small error in the angle-axis function written in p_servo.py. Indeed, I think that line 14 should be R_c = T[:3, :3].T @ Td[:3, :3]

Thank you again for your time,

Wael.