Update README.md

Previously, the SDK version could have been confused with the supported
AAS specification versions.

To alleviate this, this adds an additional text to the top of 
the `README.md`.

Author: s-heppner

README.md

@@ -1,10 +1,11 @@
 # Eclipse BaSyx Python SDK
 
-(formerly known as PyI40AAS – Python Industry 4.0 Asset Administration Shell)
-
 The Eclipse BaSyx Python project focuses on providing a Python implementation of the Asset Administration Shell (AAS) 
-for Industry 4.0 Systems. 
-These are the currently implemented specifications:
+for Industry 4.0 Systems.
+
+**Please note that the SDK version number is independent of the supported AAS versions!**
+
+These are the implemented AAS specifications of the [current SDK release](https://github.com/eclipse-basyx/basyx-python-sdk/releases/latest), which can be also found on [PyPI](https://pypi.org/project/basyx-python-sdk/):
 
 | Specification                         | Version                                                                                                                                                                         |
 |---------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
@@ -14,6 +15,9 @@ These are the currently implemented specifications:
 | Part 3a: Data Specification IEC 61360 | [v3.0 (01003-a-3-0)](https://industrialdigitaltwin.org/wp-content/uploads/2023/04/IDTA-01003-a-3-0_SpecificationAssetAdministrationShell_Part3a_DataSpecification_IEC61360.pdf) |
 | Part 5: Package File Format (AASX)    | [v3.0 (01005-3-0)](https://industrialdigitaltwin.org/wp-content/uploads/2023/04/IDTA-01005-3-0_SpecificationAssetAdministrationShell_Part5_AASXPackageFileFormat.pdf)           |
 
+If you need support to an older version of the specifications, please refer to our [prior releases](https://github.com/eclipse-basyx/basyx-python-sdk/releases). 
+Each of them has a similar table at the top of the release notes.
+
 ## Features
 This repository is structured into separate packages. 
 The `sdk` directory provides the AAS metamodel as Python objects and fundamental functionalities to handle AAS.