Update library.properties

Author: cotestatnt

library.properties

@@ -2,7 +2,7 @@ name=AsyncTelegram
 version=1.1.3
 author=Tolentino Cotesta <cotestatnt@yahoo.com>
 maintainer=Tolentino Cotesta <cotestatnt@yahoo.com>
-sentence=Simple Arduino Telegram BOT library for ESP8266 and ESP32
+sentence=**OLD VERSION - Upgrading to the version 2 is recommended**Arduino Telegram BOT library
 paragraph=Async and no blocking Arduino library for using Telegram bots on ESP8266 and ESP32 platforms. Remote OTA supported. Image message supported(both url and filesystem). Reply and Inline keyboard (with callback functions) supported. Localization messages supported. Fingerprint authentication autoupdate.
 category=Communication
 url=https://github.com/cotestatnt/asynctelegram