Update SQL change log

Update SQL change log

Author: ranisha2

src/ResourceManager/Sql/ChangeLog.md

@@ -19,6 +19,8 @@
 -->
 ## Current Release
 * Added ability to rename database using Set-AzureRmSqlDatabase
+* Fixed issue https://github.com/Azure/azure-powershell/issues/4974
+	- Removed invalid AUDIT_CHANGED_GROUP value from auditing cmdlets
 
 ## Version 4.0.1
 * Fixed assembly loading issue that caused some cmdlets to fail when executing