fix(docs): update `llamacpp.ipynb` for installation options on Mac (#32341)
The previous code generated data invalid error.
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Co-authored-by: Mason Daugherty <mason@langchain.dev>
Co-authored-by: Mason Daugherty <github@mdrxy.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>