Merge pull request #235550 from gahl-levy/patch-57

Update introduction.md

Author: prmerger-automator[bot]

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

@@ -11,7 +11,7 @@ ms.reviewer: nayakshweta
 ms.date: 03/07/2023
 ---
 
-# What is Azure Cosmos DB for MongoDB vCore?
+# What is Azure Cosmos DB for MongoDB vCore? (Preview)
 
 Azure Cosmos DB for MongoDB vCore provides developers with a fully managed MongoDB-compatible database service for building modern applications with a familiar architecture. With Cosmos DB for MongoDB vCore, developers can enjoy the benefits of native Azure integrations, low total cost of ownership (TCO), and the familiar vCore architecture when migrating existing applications or building new ones.