Update CHANGELOG.md for MSAL 4.67.2 (#5081)

Update CHANGELOG.md

Author: gladjohn

CHANGELOG.md

@@ -1,3 +1,8 @@
+4.67.2
+==========
+### Bug Fixes
+- Fixed an issue with Managed Identity source detection where Azure ML was prioritized incorrectly over Azure App Service, causing token acquisition failures. See [Bug #5077](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/issues/5077)
+  
 4.67.1
 ==========
 ### Bug Fixes