Azure Identity August Release (#4839)

* Azure Identity August Release

* Update CL

---------

Co-authored-by: Anton Kolesnyk <antkmsft@users.noreply.github.com>
Co-authored-by: Ahson Khan <ahkha@microsoft.com>

sdk/identity/azure-identity/CHANGELOG.md

@@ -1,17 +1,11 @@
 # Release History
 
-## 1.6.0-beta.1 (Unreleased)
+## 1.6.0-beta.1 (2023-08-11)
 
 ### Features Added
 
 - Added support for `WorkloadIdentityCredential`.
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.5.1 (2023-07-06)
 
 ### Bugs Fixed