Update trademarks.md

Updated trademarks for Cassandra

Author: yeturis

articles/hdinsight-aks/trademarks.md

@@ -15,4 +15,5 @@ Product names, logos and other material used on this Azure HDInsight on AKS lear
 - Apache, Apache Kafka, Kafka and the Kafka logo are trademarks of the [Apache Software Foundation](https://www.apache.org/) (ASF).
 - Apache, Apache Flink, Flink and the Flink logo are trademarks of the [Apache Software Foundation](https://www.apache.org/) (ASF).
 - Apache HBase, HBase and the HBase logo are trademarks of the [Apache Software Foundation](https://www.apache.org/) (ASF).
-- Apache®, Apache Spark™, Apache HBase®, Apache Kafka®, and Apache Flink® are either registered trademarks or trademarks of the Apache Software Foundation in the United States and/or other countries. The use of these marks does not imply endorsement by The Apache Software Foundation.
+- Apache, Apache Cassandra, Cassandra and Cassandra logo are trademarks of the [Apache Software Foundation](https://www.apache.org/) (ASF).
+- Apache®, Apache Spark™, Apache HBase®, Apache Kafka®, Apache Cassandra® and Apache Flink® are either registered trademarks or trademarks of the Apache Software Foundation in the United States and/or other countries. The use of these marks does not imply endorsement by The Apache Software Foundation.