Disable IRAM ISRs and functions by default

libraries/ESP32/examples/Timer/RepeatTimer/RepeatTimer.ino

@@ -18,7 +18,7 @@ portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
 volatile uint32_t isrCounter = 0;
 volatile uint32_t lastIsrAt = 0;
 
-void IRAM_ATTR onTimer(){
+void ARDUINO_ISR_ATTR onTimer(){
   // Increment the counter and set the time of ISR
   portENTER_CRITICAL_ISR(&timerMux);
   isrCounter++;