Add Apache Kyuubi to who is using testcontainers (#7042)

Author: bowenliang123

docs/index.md

@@ -222,6 +222,7 @@ A huge thank you to our sponsors:
 * [Bucket4j](https://github.com/bucket4j/bucket4j) - Java rate-limiting library based on the token-bucket algorithm.
 * [Spark ClickHouse Connector](https://github.com/housepower/spark-clickhouse-connector) - Integration tests for Apache Spark with both single node ClickHouse instance and multi-node ClickHouse cluster.
 * [Quarkus](https://github.com/quarkusio/quarkus) - Testcontainers is used extensively for Quarkus' [DevServices](https://quarkus.io/guides/dev-services) feature.
+* [Apache Kyuubi](https://kyuubi.apache.org) - Integration testing with Trino as data source engine, Kafka, etc.
 
 ## License