Updating title

Author: SnehaGunda

articles/cosmos-db/cassandra-introduction.md

@@ -14,7 +14,7 @@ ms.author: govindk
 ms.reviewer: sngun
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-# Introduction to Azure Cosmos DB: Apache Cassandra API
+# Introduction to Azure Cosmos DB Cassandra API
 
 Azure Cosmos DB Cassandra API can be used as the data store for apps written for [Apache Cassandra](https://cassandra.apache.org/) and DataStax. This means that by using existing [Apache drivers](https://cassandra.apache.org/doc/latest/getting_started/drivers.html?highlight=driver) compliant with CQLv4, your existing Cassandra application can now communicate with the Azure Cosmos DB Cassandra API. In many cases, you can switch from using Apache Cassandra or DataStax to using Azure Cosmos DB 's Cassandra API, by just changing a connection string.