[BUG] Error 500 on embed with one field

[dbrody]

Versions Used
Kaffy: 0.11.0
Phoenix: 1.8.1
Elixir: 1.19.1

What's actually happening?
Throws an error: no match of right hand side value: when viewing a model with an embed with one field.

What should happen instead?
The page should render properly.

Screenshots
If applicable, add screenshots to help explain your problem.

Seems like one attribute does not properly fit the list matching on line 102.

Error happens with:

Fixed when:

Issue: