Kokoro model upgrade available: model-files-v1.0 → model-files-v1.1

[github-actions]

A newer Kokoro model release is available upstream.

• Pinned in stackvox: model-files-v1.0
• Latest upstream: model-files-v1.1
• Upstream release: https://github.com/thewh1teagle/kokoro-onnx/releases/tag/model-files-v1.1

Why this isn't auto-bumped

Model upgrades can change the ONNX schema, the output sample rate, or the voice roster.
A blind URL bump could ship broken audio or break downstream code that hardcodes
voice names. So this issue is the prompt — a maintainer evaluates and bumps manually.

Checklist for the upgrade

• Update _MODEL_URL and _VOICES_URL in stackvox/engine.py to point at model-files-v1.1.
• Confirm the on-disk filenames embedded in _ensure_models (e.g. kokoro-vX.Y.onnx, voices-vX.Y.bin) still match the upstream release assets — the file names track the model version, not the release tag.
• Sanity-check the voice roster — stackvox voices against the new voice pack. If voices were removed or renamed, update the README voice table and the bash completion list in cli.py.
• Confirm the sample rate hasn't shifted (still 24 kHz for Kokoro-82M today).
• Run a manual smoke test: stackvox welcome and a few specific voices.
• If anything breaks, file the upstream change as a fix: commit so release-please surfaces it in the next release.

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Opened automatically by .github/workflows/check-kokoro-model.yml. Close manually once the upgrade is merged or explicitly declined.