update unified changelog

Author: Pan-Qi

src/Workloads/Workloads/ChangeLog.md

@@ -18,15 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
-* Introduced various new features by upgrading code generator. Please see details [here](https://github.com/Azure/azure-powershell/blob/main/documentation/Autorest-powershell-v4-new-features.md).
-* The parameters of the `New-AzWorkloadsMonitor`, `New-AzWorkloadsProviderInstance` and `Update-AzWorkloadsMonitor` cmdlet will be changed by new Managed Identity settings.
-   - Removed `-IdentityType` and `-IdentityUserAssignedIdentity` parameters.
-    - Added `-UserAssignedIdentity` parameter. The type of `UserAssignedIdentity` is simplified to a list of strings that is used to specify the user's assigned identity.
-    - Added `EnableSystemAssignedIdentity` to enable/disable system-assigned identities.
-* The parameters of the `New-AzWorkloadsSapVirtualInstance` and `Update-AzWorkloadsSapVirtualInstance` cmdlets will be changed by new Managed Identity settings.
-    - Removed `-IdentityType` and `-IdentityUserAssignedIdentity` parameters.
-    - Added `-UserAssignedIdentity` parameter. The type of `UserAssignedIdentity` is simplified to a list of strings that is used to specify the user's assigned identity.
-    - Added `EnableSystemAssignedIdentity` to enable/disable system-assigned identities.
+Improved user experience and consistency. This may introduce breaking changes. Please refer to [here](https://go.microsoft.com/fwlink/?linkid=2340249).
 
 ## Version 1.0.1
 * Preannounced breaking changes. Please refer to https://go.microsoft.com/fwlink/?linkid=2333229