Added "override" to getIRQGpio() for ESP32Board.h

src/helpers/ESP32Board.h

@@ -62,7 +62,7 @@ public:
     return raw / 4;
   }
 
-  uint32_t getIRQGpio() {
+  uint32_t getIRQGpio() override {
     return P_LORA_DIO_1; // default for SX1262
   }