Merge pull request #1465 from mcoms/patch-1

Update incorrect docs in tonePitchFollower example

Author: cmaglie

build/shared/examples/02.Digital/tonePitchFollower/tonePitchFollower.ino

@@ -4,7 +4,7 @@
  Plays a pitch that changes based on a changing analog input
  
  circuit:
- * 8-ohm speaker on digital pin 8
+ * 8-ohm speaker on digital pin 9
  * photoresistor on analog 0 to 5V
  * 4.7K resistor on analog 0 to ground