Readme updated

README.md

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-# ct-bot
+# ct-Bot
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+[![License: GPL v2](https://img.shields.io/badge/License-GPL_v2-blue.svg)](LICENSE.md) [![Chat on Matrix](https://matrix.to/img/matrix-badge.svg)](https://matrix.to/#/#ctbot:matrix.org)
+
 This repository contains the source code of the c't-Bot software framework. c't-Bot and c't-Sim belong together and represent a robot project that was initiated by the magazine [c't](https://www.heise.de/ct) in 2006.
 
 The project website can be found at [www.ct-bot.de](https://www.ct-bot.de).