docs: fix a typo in a comment

Author: mohamed hassanin

OpenLoopOn_m328P/OpenLoopOn_m328P/main.c

@@ -62,7 +62,7 @@ int main(void)
 
 //====DDR
 
-//PWM HS> (pin 9 in Arduino mega) OCR1A PB1 
+//PWM HS> (pin 9 in ArduinoUNO) OCR1A PB1 
 DDRB |= 1 << PINB1;
 //HS en PD 3,5,7 LS en PL 2,4,6 
 DDRD = 0b11111100;