Replace semaphore wait with direct task notification in beepTask

src/InterruptHandler.cpp

@@ -113,7 +113,7 @@ static void beepTask(void *pvParameters)
 
     for (;;)
     {
-        xSemaphoreTake(beepSemaphore, portMAX_DELAY);
+        ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
 
         const uint32_t tMillis = millis();