Greptile Summary

This PR replaces the authenticated GitHub API asset URL in the Homebrew formula with a standard public release download URL, removing the need for HOMEBREW_GITHUB_API_TOKEN and a separate API call to look up the numeric asset ID.

• Formula/sgpctl.rb: Drops the API URL (api.github.com/…/releases/assets/<id>) and its Accept, X-GitHub-Api-Version, and Authorization headers in favour of the conventional public URL https://github.com/scaleapi/sgpctl/releases/download/v0.0.1/sgpctl-darwin-arm64.
• .github/workflows/publish-release.yml: Removes the gh api call that resolved the numeric asset ID and updates the sed replacement to swap out the version path segment (releases/download/v[^/]*/) directly, which is simpler and more robust.

sequenceDiagram
    participant GH as GitHub Release Event
    participant WF as publish-release workflow
    participant Repo as sgpctl repo (main)

    GH->>WF: release published (TAG)
    WF->>WF: Validate required assets present
    WF->>GH: gh release download sgpctl-darwin-arm64
    WF->>WF: sha256sum artifact
    note over WF: sed replaces releases/download/v*/\nwith releases/download/TAG/\n(no API call for asset ID needed)
    WF->>Repo: commit updated Formula/sgpctl.rb
    WF->>Repo: open PR & squash-merge

_{Last reviewed commit: b967fee}