Add the using organization Byzer (#5125)

Author: hellozepp

docs/index.md

@@ -198,6 +198,7 @@ A huge thank you to our sponsors:
 * [Elastic](https://www.elastic.co) - Integration testing of the Java APM agent
 * [Alkira](https://www.alkira.com/) - Testing of multiple micro-services using Kafka, PostgreSQL, Apache Zookeeper, Etcd and so on.
 * [Togglz](https://www.togglz.org/) - Feature Flags for the Java platform
+* [Byzer](https://www.byzer.org/home) - Integration tests for Data and AI platforms are based on multiple versions of Byzer, Ray and Apache Spark.
 
 
 ## License