[Bug]: Spurious model (fulfillment-option) in the checkout documentation

[semenovm]

What happened?

Checkout documentation includes https://ucp.dev/specification/checkout/#fulfillment-option which is not linked from the checkout and has no references on https://ucp.dev/specification/checkout/ page except Table of content.

Relevant log output

Code of Conduct

• I agree to follow this project's Code of Conduct

[nearlyforget]

@jingyli - Hi Jing, would you be able to take a look at this issue?

[damaz91]

Fixed by #284