Add entry to DataFactoryV2 change log

Author: cormacpayne

src/ResourceManager/DataFactories/Commands.DataFactoryV2/Changelog.md

@@ -19,6 +19,14 @@
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 ## Current Release
+* Updated the ADF .Net SDK to version 0.6.0-preview containing the following changes:
+    - Added new AzureDatabricks LinkedService and DatabricksNotebook Activity
+    - Added headNodeSize and dataNodeSize properties in HDInsightOnDemand LinkedService
+    - Added LinkedService, Dataset, CopySource for SalesforceMarketingCloud
+    - Added support for SecureOutput on all activities 
+    - Added new BatchCount property on ForEach activity which control how many concurrent activities to run
+    - Added new Filter Activity
+    - Added Linked Service Parameters support
 
 ## Version 0.5.1
 * Add parameter "SetupScriptContainerSasUri" and "Edition" for "Set-AzureRmDataFactoryV2IntegrationRuntime" cmd to enable custom setup and edition selection functionality