Navigation block: "Justify items" not working.

[costdev]

Description

In a stream by @ryanwelcher, it was noticed the navigation block doesn't respect the user's choice of item justification.

Step-by-step reproduction instructions

1. Add a Navigation block.
2. Click "Add all pages".
3. Click the alignment icon and select "Justify items right". The items will justify to the right.
4. De-select the Navigation block. The items will justify to the left.
5. Click "Save".
6. View the frontend. The items will justify to the left.

Screenshots, screen recording, code snippet

/* block-library/blocks/navigation/style.css */
.wp-block-navigation .wp-block-page-list {
    justify-content: var(--layout-justify,initial);
}

Changing this to: --navigation-layout-justify appears to fix the issue.

Environment info

Wordpress version: 6.0-trunk
Gutenberg version: 12.3.2
Browser: Chrome

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[costdev]

Looks like this has been fixed by PR: #37718.