Combo box can't add space in input

[aliakbarazizi]

What package within Headless UI are you using?

@headlessui/react

What version of that package are you using?

v1.6.6

What browser are you using?

Chrome, Firefox

Reproduction URL

https://codesandbox.io/s/headlessui-react-combobox-autocomplete-example-v1-5-0-forked-mfv1km?file=%2Fsrc%2FApp.js

Describe your issue

When I try to type space in combobox its not working.

Just go to repo URL and try to type space in input.