Update README.md

Author: pengrad

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/pengrad/java-telegram-bot-api.svg?branch=master)](https://travis-ci.org/pengrad/java-telegram-bot-api)
 [![codecov](https://codecov.io/gh/pengrad/java-telegram-bot-api/branch/master/graph/badge.svg)](https://codecov.io/gh/pengrad/java-telegram-bot-api)  
 
-Full support of all Bot API 4.0 methods with [Telegram Passport](https://telegram.org/blog/passport) and Decryption API
+Full support of all Bot API 4.1 methods with [Telegram Passport](https://telegram.org/blog/passport) and Decryption API
 
 ## Download