Added Java language extension GitHub repo to What's new in CTP 3.0

Author: davidpeterh

docs/sql-server/what-s-new-in-sql-server-ver15.md

@@ -1,6 +1,6 @@
 ---
 title: "What's new in SQL Server 2019 | Microsoft Docs"
-ms.date: 05/22/2019
+ms.date: 05/28/2019
 ms.prod: "sql-server-2019"
 ms.reviewer: ""
 ms.technology: release-landing
@@ -47,6 +47,7 @@ In addition, the following features are added or enhanced for [!INCLUDE[sql-serv
 
 | New feature or update | Details |
 |:---|:---|
+|SQL Server Language Extensions - [Java language extension](https://docs.microsoft.com/sql/language-extensions/language-extensions-overview)|The [Microsoft Extensibility SDK for Java for Microsoft SQL Server](https://docs.microsoft.com/sql/language-extensions/how-to/extensibility-sdk-java-sql-server) is now open sourced and [available on GitHub](https://github.com/microsoft/sql-server-language-extensions).|
 |Register external languages|New DDL, `CREATE EXTERNAL LANGUAGE`, registers external languages, like Java, in SQL Server. See [CREATE EXTERNAL LANGUAGE](../t-sql/statements/create-external-language-transact-sql.md). |
 |More supported data types for Java|See [Java data types](../language-extensions/how-to/java-to-sql-data-types.md).|
 |Custom capture policy for the Query Store|When enabled, additional Query Store configurations are available under a new Query Store Capture Policy setting, to fine tune data collection in a specific server. For more information, see [ALTER DATABASE SET Options](../t-sql/statements/alter-database-transact-sql-set-options.md).|