Update README.md

Author: tbarbugli

README.md

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 [![Build Status](https://travis-ci.com/GetStream/stream-chat-python.svg?token=WystDPP9vxKnwsd8NwW1&branch=master)](https://travis-ci.com/GetStream/stream-chat-python) [![codecov](https://codecov.io/gh/GetStream/stream-chat-python/branch/master/graph/badge.svg?token=DM7rr9M7Kl)](https://codecov.io/gh/GetStream/stream-chat-python) [![PyPI version](https://badge.fury.io/py/stream-chat.svg)](http://badge.fury.io/py/stream-chat)
 
-stream-chat-python is the official Python client for [Stream chat](https://getstream.io/chat/) a service for building chat applications.
+stream-chat-python is the official Python API client for [Stream chat](https://getstream.io/chat/) a service for building chat applications.
 
 You can sign up for a Stream account at https://getstream.io/chat/get_started/.