update default output to reflect current packer release

website/source/intro/getting-started/setup.html.markdown

@@ -49,7 +49,9 @@ Available commands are:
     build       build image(s) from template
     fix         fixes templates from old versions of packer
     inspect     see components of a template
+    push        push template files to a Packer build service
     validate    check that a template is valid
+    version     Prints the Packer version
 ```
 
 If you get an error that `packer` could not be found, then your PATH