Update whats-new.md

Author: laurabren

articles/synapse-analytics/whats-new.md

@@ -49,7 +49,7 @@ The following updates are new to Azure Synapse Analytics this month.
 
   To learn more about managed identities, read [Managed identities overview](/azure/data-explorer/managed-identities-overview). 
 
-  To learn more about external tables, read [Create and alter SQL Server external tables](/azure/data-explorer/kusto/management/external-sql-tables.md). 
+  To learn more about external tables, read [Create and alter SQL Server external tables](/azure/data-explorer/kusto/management/external-sql-tables). 
 
 * **New KQL Learn module (2 out of 3) is live!** - The power of Kusto Query Language (KQL) is its simplicity to query structured, semi-structured, and unstructured data together. To make it easier for you to learn KQL, we are releasing Learn modules. Previously, we released [Write your first query with Kusto Query Language](/learn/modules/write-first-query-kusto-query-language/). New this month is [Gain insights from your data by using Kusto Query Language](/learn/modules/gain-insights-data-kusto-query-language/). 
 
@@ -87,4 +87,4 @@ The following updates are new to Azure Synapse Analytics this month.
 
 ## Next steps
 
-[Get started with Azure Synapse Analytics](get-started.md)
+[Get started with Azure Synapse Analytics](get-started.md)