fix: chain goreleaser into release-please workflow (#16)

GITHUB_TOKEN-triggered tag pushes don't trigger other workflows,
so the separate release.yml never ran. Chain the goreleaser job
directly into release-please.yml so binaries get built on release.

Co-authored-by: rt-claw-d <rt-claw-d@rt-clawone.iam.gserviceaccount.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people