fix(ci): regenerate ui_kit goldens on the platform CI actually runs on

The Test job failed with 0.14-0.49% pixel diffs on all 4 goldens — small,
localized to anti-aliased text/icon edges, no layout or color change. The
goldens were captured on macOS; CI compares on ubuntu-latest, where font
rendering differs enough to trip matchesGoldenFile despite nothing being
visually broken. Regenerated via a one-off push-triggered workflow run on
ubuntu-latest itself, then removed.

Author: aiserrock