Add attribution and a link to Chris Warkocki's blog to the Moons step…

…per motors page

Moons_stepper_motors.md

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-Some people have reported improvements after replacing the LDO stepper motors that ship with the MK3 with steppers from Moons Industries. In general, don't expect a huge print quality improvement from this change, but the Moons motors do run quieter and cooler, and can supply more torque for a given amount of current. Given the issues with extruder heat creep, replacing the extruder motor only would be the best “bang for the buck”.
+Prusa blogger Chris Warkocki experimented with and popularized use of stepper motors from Moons Industries as a replacement for the Prusa-supplied LDO steppers on the MK3. Chris has an excellent [write-up](https://prusacommunity.com/to-the-moons-and-back/) on this topic on his blog. My findings mirror Chris' experience; in general, don't expect a huge print quality improvement from this change, but the Moons motors do run quieter and cooler, and can supply more torque for a given amount of current. Given the issues with extruder heat creep, replacing the extruder motor only would be the best “bang for the buck”.
 
 The Moons motor that is the closest replacement is the [MS17HD2P4100](https://www.moonsindustries.com/p/nema-17-standard-hybrid-stepper-motors/ms17hd2p4100-000004611110008899). This motor will require a custom cable, but otherwise is a drop-in replacement for the LDO stepper on the X and E axis. **On the Y axis, you will have an issue aligning the pulley because the flat on the Moons motor is not machined over the whole shaft** (you can get close by flipping the pulley around).