- DOCKERHUB.md: update stale 0.3.5 examples to 0.9.0, multi-arch note, mirrors
section (.com/.to/.onion), point all links to torrentclaw.com (GitHub 404s
anonymously under the org shadow-ban)
- release.yml: add peter-evans/dockerhub-description step so a tag push also
syncs the Docker Hub page from DOCKERHUB.md (continue-on-error)