Update Change Log for EventHubs and ServiceBus (#21830)

Author: msJinLei

src/EventHub/EventHub/ChangeLog.md

@@ -18,6 +18,8 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Aliased `New-AzEventHubNamespace`, `Remove-AzEventHubNamespace`, `Set-AzEventHubNamespace`, `Get-AzEventHubNamespace` with `New-AzEventHubNamespaceV2`, `Remove-AzEventHubNamespaceV2`, `Set-AzEventHubNamespaceV2`, `Get-AzEventHubNamespaceV2` respectively
+* Replaced `New-AzEventHubEncryptionConfig` by `New-AzEventHubKeyVaultPropertiesObject`
 
 ## Version 3.2.3
 * Added upcoming breaking change notifications for Az.EventHub module.

src/ServiceBus/ServiceBus/ChangeLog.md

@@ -19,6 +19,8 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Aliased `New-AzServiceBusNamespace`, `Remove-AzServiceBusNamespace`, `Set-AzServiceBusNamespace`, `Get-AzServiceBusNamespace` with `New-AzServiceBusNamespaceV2`, `Remove-AzServiceBusNamespaceV2`, `Set-AzServiceBusNamespaceV2`, `Get-AzServiceBusNamespaceV2` respectively.
+* Replaced `New-AzServiceBusEncryptionConfig` by `New-AzServiceBusKeyVaultPropertiesObject`
 
 ## Version 2.2.1
 * Added upcoming breaking change notifications for Az.ServiceBus module.