added example sketch documentation

Author: cristidragomir97

Diff for: examples/Standby_WakeFromRTC_H7/Standby_WakeFromRTC_H7.ino

@@ -59,6 +59,7 @@ void setup() {
     board.shutDownFuelGauge();
 
 
+
     // The LED should go off when the board goes to sleep
     board.setAllPeripheralsPower(false);