Update readme.md

Author: gevorg95

readme.md

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 # Caché Web Terminal
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+[![Gitter](https://img.shields.io/badge/chat-on%20telegram-blue.svg)](https://t.me/joinchat/FoZ4M0jbeW8PVp2l5tqrgg)
+
 Web-based Caché terminal for InterSystems products. Access your database from everywhere!
 
 + Visit the [project's page](http://intersystems-ru.github.io/webterminal) for more details.