Updated link to official ClickHouse website

Author: Enmk

README.md

@@ -1,7 +1,7 @@
 ClickHouse C++ client [![Build Status](https://travis-ci.org/ClickHouse/clickhouse-cpp.svg?branch=master)](https://travis-ci.org/ClickHouse/clickhouse-cpp)
 =====
 
-C++ client for [Yandex ClickHouse](https://clickhouse.yandex/)
+C++ client for [ClickHouse](https://clickhouse.tech/).
 
 ## Supported data types