Fix edit_form_query documentation example

[lukeclimen]

The documentation example give for the edit_form_query in the cookbook references an older implementation of the function. This updates the cookbook to provide a working example.

fixes #733

[lukeclimen]

Hi @aminalaee, I wanted to update the docs to match the updated version of the edit_form_query, so I've submitted a small PR that updates the cookbook example. I have local tests that I've used to validate that this works as expected, and can add a commit if you'd like them included as well!

[aminalaee]

Thanks for the PR