Update ExternalWakeUp.ino (espressif#1332)

Author: Gius-8

Diff for: libraries/ESP32/examples/DeepSleep/ExternalWakeUp/ExternalWakeUp.ino

@@ -69,7 +69,7 @@ void setup(){
   esp_sleep_enable_ext0_wakeup(GPIO_NUM_33,1); //1 = High, 0 = Low
 
   //If you were to use ext1, you would use it like
-  //esp_deep_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK,ESP_EXT1_WAKEUP_ANY_HIGH);
+  //esp_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK,ESP_EXT1_WAKEUP_ANY_HIGH);
 
   //Go to sleep now
   Serial.println("Going to sleep now");