No code change; go get picks this up only if you want the docs assets.
Every asset under docs/assets is recut from a committed master that carries its own alpha, by scripts/regenerate_logo_assets.py — so the next reroll is one command rather than eight hand edits.
Two of them were wrong before, not just stale: logo.png (256x256) and apple-touch-icon.png (180x180) were square crops of a landscape mark, which sliced off the banner and the star. They are letterboxed now. mkdocs.yml points its nav logo at assets/logo.png like every sibling port instead of reaching for the 600px hero, and docs/assets/favicon.svg — Astro's logo, copied in from the website repo and referenced by nothing — is deleted.
The landing, error and 401 pages this package serves link logo-hero.png from the docs site by URL, so they pick up the new mark on the next docs deploy without a release at all.