website: update for Windows AWS instances

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

@@ -168,6 +168,10 @@ each category, the available configuration keys are alphabetized.
 * `vpc_id` (string) - If launching into a VPC subnet, Packer needs the
   VPC ID in order to create a temporary security group within the VPC.
 
+* `windows_password_timeout` (string) - The timeout for waiting for
+  a Windows password for Windows instances. Defaults to 20 minutes.
+  Example value: "10m"
+
 ## Basic Example
 
 Here is a basic example. It is completely valid except for the access keys:

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

@@ -209,6 +209,10 @@ each category, the available configuration keys are alphabetized.
   it is perfectly okay to create this directory as part of the provisioning
   process.
 
+* `windows_password_timeout` (string) - The timeout for waiting for
+  a Windows password for Windows instances. Defaults to 20 minutes.
+  Example value: "10m"
+
 ## Basic Example
 
 Here is a basic example. It is completely valid except for the access keys: