Update README.md

Author: FrankSchnicke

README.md

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 # Eclipse BaSyx Java SDK
 [![BaSyx Logo](https://www.eclipse.org/basyx/img/basyxlogo.png)](https://www.eclipse.org/basyx/)
 
+This repository contains BaSyx Java V1. If you're looking for BaSyx Java V2, see [here](https://github.com/eclipse-basyx/basyx-java-server-sdk).
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 The Eclipse BaSyx Java SDK is part of the [Eclipse BaSyx middleware](https://www.eclipse.org/basyx/). The SDK has been created within the [BaSys](https://www.basys40.de/) project.
 
 ## Eclipse Wiki