Azure.Communication.Identity release updates (Azure#31707)

Author: AikoBB

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

@@ -1,9 +1,9 @@
 # Release History
 
-## 1.2.0 (Unreleased)
+## 1.2.0 (2022-10-11)
 
 ### Features Added
-- Added support to customize the Communication Identity access token’s validity period:
+- Added support to customize the Communication Identity access token’s validity period:
     - Added method overloads that provide the ability to create a Communication Identity access token with custom expiration:
         - `CreateUserAndToken(IEnumerable<CommunicationTokenScope> scopes, TimeSpan tokenExpiresIn, CancellationToken cancellationToken = default)`
         - `CreateUserAndTokenAsync(IEnumerable<CommunicationTokenScope> scopes, TimeSpan tokenExpiresIn, CancellationToken cancellationToken = default)`