Increase _network_event_task priority (#2184)

Fixes espressif/arduino-esp32#1595

Author: dash0820

Diff for: libraries/WiFi/src/WiFiGeneric.cpp

@@ -96,7 +96,7 @@ static bool _start_network_event_task(){
         }
     }
     if(!_network_event_task_handle){
-        xTaskCreatePinnedToCore(_network_event_task, "network_event", 4096, NULL, 2, &_network_event_task_handle, ARDUINO_RUNNING_CORE);
+        xTaskCreatePinnedToCore(_network_event_task, "network_event", 4096, NULL, ESP_TASKD_EVENT_PRIO - 1, &_network_event_task_handle, ARDUINO_RUNNING_CORE);
         if(!_network_event_task_handle){
             log_e("Network Event Task Start Failed!");
             return false;