fixed certificates 4.0.0b3 changelog
- Enums 'JsonWebKeyCurveName' and 'JsonWebKeyType' have been renamed to 'KeyCurveName' and 'KeyType', respectively.
## 4.0.0b3 (2019-09-11)
-Version 4.0.0b3 is the first preview of our efforts to create a user-friendly and Pythonic client library for Azure Key Vault.
-For more information about preview releases of other Azure SDK libraries, please visit https://aka.ms/azure-sdk-preview1-python.
+Version 4.0.0b3 is the first preview of our efforts to create a user-friendly and Pythonic client library for Azure Key Vault's certificates.
This library is not a direct replacement for `azure-keyvault`. Applications
using that library would require code changes to use `azure-keyvault-certificates`.
