docs: Fix invalid example

website/source/docs/templates/introduction.html.markdown

@@ -54,6 +54,7 @@ missing valid AWS access keys. Otherwise, it would work properly with
       "secret_key": "...",
       "region": "us-east-1",
       "source_ami": "ami-de0d9eb7",
+      "instance_type": "m1.small",
       "ssh_username": "ubuntu",
       "ami_name": "packer {{.CreateTime}}"
     }
@@ -62,7 +63,7 @@ missing valid AWS access keys. Otherwise, it would work properly with
   "provisioners": [
     {
       "type": "shell",
-      "path": "setup_things.sh"
+      "script": "setup_things.sh"
     }
   ]
 }