Update open_loop_velocity_6pwm.ino

Author: askuric

examples/hardware_specific_examples/Teensy/Teensy3/open_loop_velocity_6pwm/open_loop_velocity_6pwm.ino

@@ -38,7 +38,7 @@ void setup() {
   // limiting motor movements
   // limit the voltage to be set to the motor
   // start very low for high resistance motors
-  // currnet = resistance*voltage, so try to be well under 1Amp
+  // currnet = voltage/resistance, so try to be well under 1Amp
   motor.voltage_limit = 3;   // [V]
 
   // open loop control config