README.md in kitchen-ec2-1.1.0 vs README.md in kitchen-ec2-1.2.0

@@ -176,11 +176,12 @@
 The ID of the AWS key pair you want to use.
 
 The default will be read from the `AWS_SSH_KEY_ID` environment variable if set,
 or `nil` otherwise.
 
-This must be one of the KeyName values shown by the AWS CLI: `aws ec2 describe-key-pairs`
+If `aws_ssh_key_id` is specified, it must be one of the KeyName values shown by the AWS CLI: `aws ec2 describe-key-pairs`.
+Otherwise, if not specified, you must either have a user pre-provisioned on the AMI, or provision the user using `user_data`.
 
 #### `transport.ssh_key`
 
 The private key file for the AWS key pair you want to use.
 
@@ -285,9 +286,15 @@
 The default is `nil`.
 
 ### `spot_price`
 
 The price you bid in order to submit a spot request. An additional step will be required during the spot request process submission. If no price is set, it will use an on-demand instance.
+
+The default is `nil`.
+
+### `instance_initiated_shutdown_behavior`
+
+Control whether an instance should `stop` or `terminate` when shutdown is initiated from the instance using an operating system command for system shutdown.
 
 The default is `nil`.
 
 ### block_duration_minutes