update reset comments for HSMini

examples/DDS/DDS.ino

@@ -33,6 +33,7 @@ void setup() {
   pinMode(SWITCH_PIN, INPUT_PULLUP);
   
   // set up the reset control pin
+  // NOTE: HamShieldMini doesn't have a reset pin, so this has no effect
   pinMode(RESET_PIN, OUTPUT);
   // turn on radio
   digitalWrite(RESET_PIN, HIGH);