refactor: add span to LinkListItem when inDropdown

[federico-ntr]

Fixes #

PR Checklist

• My branch is up-to-date with the Upstream main branch.
• The unit tests pass locally with my changes (if applicable).
• I have added tests that prove my fix is effective or that my feature works (if applicable).
• I have added necessary documentation (if appropriate).

Short description of what this resolves:

Changes proposed in this Pull Request:

[vercel]

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[federico-ntr]

Note mainly for me:

Comparing the storybooks after removing the spans. Here's what's wrong/different for now:

• Dropdown -> Menu icona a destra: missing space between text and icon, it may be a bug or that I removed the wrong span
• Dropdown -> Menu dark: same as above

[vercel]

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Project	Deployment	Preview	Updated (UTC)
design-react-kit	Ready	Preview	Oct 24, 2025 4:32pm

[federico-ntr]

I changed my mind about this change, as it would probably be breaking. It's probably better to fix the storybook and keep this change for the next major release. @astagi what do you think about it? Tagging you because we talked about this in the Slack