SDK updates for Communication stable version 2023-03-31 (Azure#35077)

* SDK updates for Communication stable version 2023-03-31

* Version bump.

* Fixing type in changelog update

* Fixing typo in changelog update

* Removing empty sections in changelog

* Adding changelog note regarding new azure sdk standards

* Removing en-us from url.

* Moved sdk update note to bc section

sdk/communication/Azure.ResourceManager.Communication/CHANGELOG.md

@@ -1,14 +1,15 @@
 # Release History
 
-## 1.1.0-beta.7 (Unreleased)
+## 1.1.0 (2023-03-31)
 
 ### Features Added
+- Added SenderUsernameResource, SenderUsernameResourceCollection and SenderUsernameResourceData to support the new resource type.
 
 ### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- This refresh updates `Azure.ResourceManager.Communication` library to the Azure resource management SDK standards and matches the patterns in the rest of the new Azure management libraries. [Resource management using the Azure SDK for .NET](https://learn.microsoft.com/dotnet/azure/sdk/resource-management?tabs=PowerShell)
+- Removed ValidSenderUsernames property from CommunicationServiceResourceData.
+- CommunicationResource RegenerateKey and RegenerateKeyAsync are no longer marked as long running operations.
+- CommunicationResource Update and UpdateAsync are no longer marked as long running operations.
 
 ## 1.1.0-beta.6 (2023-02-14)