Combobox: Wrong placement of aria-multiselectable attribute? ARIA attribute is not allowed: aria-multiselectable="true"

[RIP21]

What package within Headless UI are you using?

@headlessui/react

What version of that package are you using?

1.7.10

What browser are you using?
Chrome

Reproduction URL

Screenshot:

The multi-select implementation I have, for reference, is here:
Codesandbox

Describe your issue

As per MDN aria-multiselectable="true" should be set on ul element (e.g. the container of the options not on the input). a11y checks (a11y-addon) of the Storybook complains about it.

I'm, by no means, an expert in ARIA attributes, but just noted this violation and I think it makes sense to report it.

[RobinMalfait]

Hey! Thank you for your bug report!
Much appreciated! 🙏

This should be fixed by #2271, and will be available in the next release.

You can already try it using:

• npm install @headlessui/react@insiders.
• npm install @headlessui/vue@insiders.