[java] Update License information (#2022)

* Update about.mdx

* Update overview.mdx

* Apply suggestions from code review

Author: jjtang1985

docs-java/overview.mdx

@@ -188,7 +188,7 @@ The SAP Cloud SDK can be integrated into applications based on [SAP Cloud Applic
 
 ### Availability and Licensing
 
-All libraries are available on [Maven Central](https://central.sonatype.dev/search?namespace=com.sap.cloud.sdk) under the [SAP Developer license](https://tools.eu1.hana.ondemand.com/developer-license-3_1.txt).
+All libraries are available on [Maven Central](https://central.sonatype.dev/search?namespace=com.sap.cloud.sdk) under the Apache 2.0 license.
 The license of clients generated with any of the SAP Cloud SDK code generators depends on the used service spec license.
 
 ### Release Schedule

docs/about.mdx

@@ -38,8 +38,7 @@ For a complete overview of supported features, check out the [feature matrix](./
 
 ## License
 
-The SAP Cloud SDK for [JavaScript / TypeScript](https://github.com/SAP/cloud-sdk-js) is open-source and available under the Apache 2.0 license.
-The SAP Cloud SDK for Java is closed source and the libraries are distributed under the [SAP Developer License](https://tools.eu1.hana.ondemand.com/developer-license-3_1.txt).
+Both [JavaScript / TypeScript](https://github.com/SAP/cloud-sdk-js) and [Java](https://github.com/SAP/cloud-sdk-java) variants are open-source and available under the Apache 2.0 license.
 
 ## Products Using the SAP Cloud SDK