Update README.md

README.md

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 In this repository, the BaSyx Java V2 components fully compatible with *Details of the Asset Administration Shell V3* are as well as their respective Clients are contained. For each component, a multitude of backends (e.g., InMemory, MongoDB) as well as further features (MQTT, ...) are provided. All components are available on [DockerHub](https://hub.docker.com/search?q=eclipsebasyx) as off-the-shelf components and can be easily configured and extended. Additionally, the server SDK of this repository can be used for implementation of further components.
 
+## Server SDK
 The following off-the-shelf components are available:
 
 * [AAS Repository](basyx.aasrepository)
@@ -13,6 +14,7 @@ The following off-the-shelf components are available:
 * [Submodel Registry](basyx.submodelregistry)
 * [AAS Discovery](basyx.aasdiscoveryservice)
 
+## Client SDK
 In addition, the following Clients are available:
 * [AAS Repository Client](basyx.aasrepository/basyx.aasrepository-client)
 * [Submodel Repository Client](basyx.submodelrepository/basyx.submodelrepository-client)