Update ChangeLog.md

Author: Maddie Clayton

src/ResourceManager/KeyVault/ChangeLog.md

@@ -24,6 +24,11 @@
 * Added new cmdlets: Backup/Restore-AzureKeyVaultManagedStorageAccount, Backup/Restore-AzureKeyVaultCertificate, Undo-AzureKeyVaultManagedStorageSasDefinitionRemoval, and Undo-AzureKeyVaultManagedStorageAccountRemoval
 * Set minimum dependency of module to PowerShell 5.0
 
+## Version 4.4.0-preview
+* Updated cmdlets to include piping scenarios
+* Added new cmdlets around NewtorkRules: Add/Remove/Update-AzureKeyVaultNetworkRule
+* Added new cmdlets: Backup/Restore-AzureKeyVaultManagedStorageAccount, Backup/Restore-AzureKeyVaultCertificate, Undo-AzureKeyVaultManagedStorageSasDefinitionRemoval, and Undo-AzureKeyVaultManagedStorageAccountRemoval
+
 ## Version 4.3.0
 * Updated cmdlets to include piping scenarios
 * Add deprecation messages for upcoming breaking change release