list: pass args properly

[Rylan12]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew tests with your changes locally?

---

Fixes #8170.

After #8144 some commands don't pass args properly. In this case, brew list --pinned displayed all formulae not just pinned ones.

[Bo98]

LGTM - thanks!