[Backport staging-25.11] eb-garamond: disable ttfautohint's GUI

[nixpkgs-ci]

Bot-based backport to staging-25.11, triggered by a label in #463023.

Before merging, ensure that this backport is acceptable for the release.

Even as a non-committer, if you find that it is not acceptable, leave a comment.

[bengsparks]

nixpkgs-review result

Generated using nixpkgs-review.

Command: nixpkgs-review pr 468171 --checkout commit
Commit: a0b56d1c084d9c8b8470140de9d19f0a9fc1ed46

---

aarch64-darwin

✅ 1 package built:

• eb-garamond

[bengsparks]

@NixOS/nixpkgs-merge-bot merge

[nixpkgs-ci]

@bengsparks wants to merge this PR.

Requirements to merge this PR with @NixOS/nixpkgs-merge-bot merge:

• ✅ PR targets a development branch.
• ✅ PR touches only files of packages in pkgs/by-name/.
• ✅ PR is at least one of:
  • ⬜ Approved by a committer.
  • ✅ Backported via label.
  • ⬜ Opened by a committer.
  • ⬜ Opened by r-ryantm.
• ✅ bengsparks is a member of @NixOS/nixpkgs-maintainers.
• ✅ bengsparks is a maintainer of all touched packages.

✔️ Queued for merge (#306934)