Add 5 milliohm shunt version for Flipsky 75100v2 Hardware

[groybe]

For users of 5 milliohm shunts. Useful for large servo motors with lower currents. A few people are using this for simracing wheels.

[Toni67]

Would be a nice addition indeed, default shunts are cruelly lacking definition with these servos, allow the use of R005 would be very welcome.