Adds skip_upload: auto to the brews block. With release.prerelease: auto, GoReleaser correctly marks rc/beta/alpha tags as GitHub prereleases — but without skip_upload: auto, the Homebrew formula was still being updated for those prereleases. Effect: brew upgrade edgesync would pull the rc binary as a stable update.

skip_upload: auto skips brew formula updates whenever the release is marked as prerelease. Stable releases (vX.Y.Z without suffix) still update the formula. check-in: 233d9d94d5 user: [email protected] tags: trunk