Fixed typo in index.md

Fixed typo on line 351. `current_sese` -> `current_sense`

Author: BoguesUser

docs/simplefoc_library/code/index.md

@@ -348,7 +348,7 @@ void setup() {
   // link driver and the current sense
 
   // link the motor to current sense
-  motor.linkCurrentSense(&current_sese);
+  motor.linkCurrentSense(&current_sense);
 
   // set control loop type to be used
   motor.controller = MotionControlType::velocity;