Update README.md

Author: asmyasnikov

README.md

@@ -11,6 +11,7 @@
 ![Comments](https://sloc.xyz/github/ydb-platform/ydb-go-sdk/?category=comments)
 [![View examples](https://img.shields.io/badge/learn-examples-brightgreen.svg)](https://github.com/ydb-platform/ydb-go-examples)
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+[![WebSite](https://img.shields.io/badge/website-ydb.tech-blue.svg)](https://ydb.tech)
 
 Supports `table`, `discovery`, `coordination`, `ratelimiter`, `scheme` and `scripting` clients for `YDB`. 
 `YDB` is an open-source Distributed SQL Database that combines high availability and scalability with strict consistency and ACID transactions.