Add ManagementParnter cmdlets information to changlog.md of Resources project

Author: jeffrey-ace

src/ResourceManager/Resources/ChangeLog.md

@@ -19,6 +19,11 @@
 -->
 ## Current Release
 * Get-AzureRmADServicePrincipal: Removed -ServicePrincipalName from the default Empty parameter set as it was redundant with the SPN parameter set
+* Add ManagementPartner cmdlets
+    - New-AzureRmManagementPartner cmdlet to create a management partner
+    - Get-AzureRmManagementPartner cmdlet to list the management partner for the current user
+    - Remove-AzureRmManagementPartner cmdlet to delete a management partner
+    - Update-AzureRmManagementPartner cmdlet to update an existing management partner
 
 ## Version 5.2.0
 * Added Location Completer to -Location parameters allowing tab completion through valid Locations