Cosmos DB, Line 41, Version Addion

Added mention of version 4.2 to the overview page of for Azure Cosmos DB API for MongoDB.
Azure -> Cosmos DB -> MongoDB API

Author: riswinto

articles/cosmos-db/mongodb/mongodb-introduction.md

@@ -38,6 +38,7 @@ Azure Cosmos DB API for MongoDB implements the wire protocol for MongoDB. This i
 MongoDB feature compatibility:
 
 Azure Cosmos DB API for MongoDB is compatible with the following MongoDB server versions:
+- [Version 4.2](feature-support-42.md)
 - [Version 4.0](feature-support-40.md)
 - [Version 3.6](feature-support-36.md)
 - [Version 3.2](feature-support-32.md)