Update DFRobotAS3935LightningSensorDetailed.ino

Made the same change in this file as I did in #16

examples/DFRobotAS3935LightningSensorDetailed/DFRobotAS3935LightningSensorDetailed.ino

@@ -20,12 +20,11 @@
 
 volatile int8_t AS3935IsrTrig = 0;
 
-
-#if defined(ESP32) || defined(ESP8266)
-#define IRQ_PIN       0 
-#else
+// The Arduino UNO can only use IO2 or IO3 as interrupt pins, whereas the 
+// ESP32 can use all pins as interrupt pins. Connect the lightning sensor's 
+// IRQ pin to a GPIO pin on the microcontroller then replace the number 
+// below with the connected GPIO pin. 
 #define IRQ_PIN       2
-#endif
 
 // Antenna tuning capcitance (must be integer multiple of 8, 8 - 120 pf)
 #define AS3935_CAPACITANCE   96