Update examples

esp_modem/examples/modem_console/main/console_helper.cpp

@@ -1,6 +1,11 @@
-//
-// Created by david on 3/17/21.
-//
+/* Modem console example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
 
 #include "console_helper.hpp"
 #include "esp_log.h"