Update to reflect changes to Get-PnPCustomAction

Author: erwinvanhunen

CHANGELOG.md

@@ -65,6 +65,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Removed `-Confirm` parameter from `Remove-PnPUser` and `Remove-PnPAvailableSiteClassification` cmdlets. Use `-Force` instead. [#4455](https://github.com/pnp/powershell/pull/4455)
 - `Get-PnPFile` now also supports passing in a full SharePoint Online URL [#4480](https://github.com/pnp/powershell/pull/4480)
 - `Send-PnPMail` now throws a warning about the retirement of the SharePoint SendEmail API.
+- `Get-PnPCustomAction` now supports a completer for `-Identity` and uses the PnP Core SDK to return custom actions.
 
 ### Fixed
 

MIGRATE-2.0-to-3.0.md

@@ -71,3 +71,4 @@ Recommend referring to these 2 links:
 | **Cmdlet** | **Comment** |
 | ----------- | ---------------------- |
 | Get-PnPAccessToken | The output type is now `Microsoft.IdentityModel.JsonWebTokens.JsonWebToken`, earlier it was `System.IdentityModel.Tokens.Jwt` |
+| Get-PnPCustomAction "| The output type is now `PnP.Core.Model.SharePoint.UserCustomAction`, earlier it was `Microsoft.SharePoint.Client.UserCustomAction` |