Update stepper-library-examples.md

Description:
The default Stepper library examples often use the sequence (8, 9, 10, 11). However, for the widely used 28BYJ-48 stepper motor paired with the ULN2003 driver board, this sequence causes vibration without rotation.

Updating the pin definition to (8, 10, 9, 11) correctly sequences the internal coils, ensuring smooth rotation as intended by the tutorial.

Author: gilgvirts

content/learn/04.electronics/04.stepper-motors/stepper-library-examples.md

@@ -54,7 +54,7 @@ A stepper motor follows the turns of a potentiometer (or other sensor) on analog
 // create an instance of the stepper class, specifying
 // the number of steps of the motor and the pins it's
 // attached to
-Stepper stepper(STEPS, 8, 9, 10, 11);
+Stepper stepper(STEPS, 8, 10, 9, 11);
 
 // the previous reading from the analog input
 int previous = 0;
@@ -173,4 +173,4 @@ void loop() {
     myStepper.step(stepsPerRevolution / 100);
   }
 }
-```
+```