Update README.md

Author: glibnub

README.md

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-# Developing a Node.js app with Gremlin Graph Data using Azure Cosmos DB
+# Develop a Node.js app with Gremlin Graph and Azure Cosmos DB
+
 Azure Cosmos DB is a globally distributed multi-model database. One of the supported APIs is the Graph (Gremlin) API, which provides a graph data model with [Gremlin query/traversals](https://tinkerpop.apache.org/gremlin.html). This sample shows you how to use the Azure Cosmos DB with the Graph API to store and access data from a Node.js application.
 
 ## Running this sample