turn builtin LED on at start

cubesatsim/cubesatsim.ino

@@ -3648,6 +3648,7 @@ void config_gpio() {
 //  if (!wifi) 
   Serial.println("Blinking pins");	
   pinMode(led_builtin_pin, OUTPUT);  // Set LED pin to output
+  digitalWrite(led_builtin_pin, HIGH); // Leave Pico LED on
   pinMode(MAIN_LED_GREEN, OUTPUT);  // Set Main Green LED pin to output
   blink_pin(MAIN_LED_GREEN, 150);
   digitalWrite(MAIN_LED_GREEN, HIGH); // Leave Green LED on