reboot task - increase stack size (#2201)

Avoid stack overflow

code/components/jomjol_fileserver_ota/server_ota.cpp

@@ -617,7 +617,7 @@ void doReboot()
     LogFile.WriteToFile(ESP_LOG_INFO, TAG, "Reboot triggered by Software (5s)");
     LogFile.WriteToFile(ESP_LOG_WARN, TAG, "Reboot in 5sec");
 
-    BaseType_t xReturned = xTaskCreate(&task_reboot, "task_reboot", configMINIMAL_STACK_SIZE * 3, (void*) true, 10, NULL);
+    BaseType_t xReturned = xTaskCreate(&task_reboot, "task_reboot", configMINIMAL_STACK_SIZE * 4, (void*) true, 10, NULL);
     if( xReturned != pdPASS )
     {
         LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "task_reboot not created -> force reboot without killing flow");