Add note about default password generation in Azure

CHANGELOG.md

@@ -204,6 +204,7 @@ CHANGES:
 * auth/gcp: Changes the default name of the entity alias that gets created to be the role ID for both IAM and GCE authentication. [[GH-99](https://github.com/hashicorp/vault-plugin-auth-gcp/pull/99)]
 * core: Remove the addition of newlines to parsed configuration when using integer/boolean values [[GH-8928](https://github.com/hashicorp/vault/pull/8928)]
 * cubbyhole: Reject reads and writes to an empty ("") path. [[GH-8971](https://github.com/hashicorp/vault/pull/8971)]
+* secrets/azure: Default password generation changed from uuid to cryptographically secure randomized string [[GH-40](https://github.com/hashicorp/vault-plugin-secrets-azure/pull/40)]
 * storage/gcs: The `credentials_file` config option has been removed. The `GOOGLE_APPLICATION_CREDENTIALS` environment variable
   or default credentials may be used instead [[GH-9424](https://github.com/hashicorp/vault/pull/9424)]
 * storage/raft: The storage configuration now accepts a new `max_entry_size` config that will limit