Correct typo in documentation: gimbal_velocity_example.md

Author: exMagic

docs/simplefoc_library/examples/gimbal_velocity_example.md

@@ -92,7 +92,7 @@ And that is it, let's setup the motor.
 
 
 ## Motor code
-First we need to define the `BLDCMotor` class with the  number od pole pairs (`14`)
+First we need to define the `BLDCMotor` class with the  number of pole pairs (`14`)
 ```cpp
 // define BLDC motor
 BLDCMotor motor = BLDCMotor(14);