update history again

sdk/identity/azure-identity/HISTORY.md

@@ -1,17 +1,19 @@
 # Release History
 
 ## 1.0.0b2 (2019-08-05)
-Breaking changes:
-- Removed `Configuration` from the public API in prepration for entirely
-kwargs-based configuration. Static `create_config` methods have been renamed
-`_create_config`, and will be removed entirely in a future release.
+### Breaking changes:
+- Removed `azure.core.Configuration` from the public API in preparation for a
+revamped configuration API. Static `create_config` methods have been renamed
+`_create_config`, and will be removed in a future release.
 
-Dependency changes:
-- Adopted [`azure-core`](https://pypi.org/project/azure-core/) 1.0.0b2
+### Dependency changes:
+- Adopted [azure-core](https://pypi.org/project/azure-core/) 1.0.0b2
+  - If you later want to revert to azure-identity 1.0.0b1, or another Azure SDK
+  library requiring azure-core 1.0.0b1, you'll need to `pip uninstall azure-core`
 - Adopted [MSAL](https://pypi.org/project/msal/) 0.4.1
 - New dependency for Python 2.7: [mock](https://pypi.org/project/mock/)
 
-New credentials:
+### New features:
 - Added credentials for authenticating users:
 [`DeviceCodeCredential`](https://azure.github.io/azure-sdk-for-python/ref/azure.identity.html#azure.identity.DeviceCodeCredential),
 [`InteractiveBrowserCredential`](https://azure.github.io/azure-sdk-for-python/ref/azure.identity.html#azure.identity.InteractiveBrowserCredential),