website: update docs for ssh_keypair_name

website/source/docs/builders/amazon-ebs.html.markdown

@@ -148,6 +148,11 @@ AMI if one with the same name already exists. Default `false`.
    spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
    `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)`, `Windows (Amazon VPC)`
 
+* `ssh_keypair_name` (string) - If specified, this is the key that will be
+  used for SSH with the machine. By default, this is blank, and Packer will
+  generate a temporary keypair. `ssh_private_key_file` must be specified
+  with this.
+
 * `ssh_port` (integer) - The port that SSH will be available on. This defaults
   to port 22.
 

website/source/docs/builders/amazon-instance.html.markdown

@@ -187,6 +187,11 @@ AMI if one with the same name already exists. Default `false`.
    spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
    `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)`, `Windows (Amazon VPC)`
 
+* `ssh_keypair_name` (string) - If specified, this is the key that will be
+  used for SSH with the machine. By default, this is blank, and Packer will
+  generate a temporary keypair. `ssh_private_key_file` must be specified
+  with this.
+
 * `ssh_port` (integer) - The port that SSH will be available on. This defaults
   to port 22.