Update Github_Tutorial.ino

Correct from byte to int

Author: djc79

Github_Tutorial.ino

@@ -21,7 +21,7 @@ void setup()
 
 void loop() 
 {
-  byte myValue = 0;
+  int myValue = 0;
   myValue = analogRead(A0);
 
   Serial.print("The value is: ");