clean up changelog

Author: billwert

sdk/identity/azure-identity/CHANGELOG.md

@@ -66,6 +66,7 @@
 - Added `AzurePipelinesCredential` to support [Microsoft Entra Workload ID](https://learn.microsoft.com/azure/devops/pipelines/library/service-endpoints?view=azure-devops&tabs=yaml) in Azure Pipelines service connections.
 
 ### Other Changes
+- Migrated Managed Identity authentication flow to utilize Msal4j MI implementation.
 
 ## 1.12.1 (2024-05-02)