Pin torchcodec for Gemma 4 audio notebook

[Auro-rium]

Closes #304

What

Pin torchcodec to 0.10.0 in the Gemma 4 E2B audio notebook and its generated Python script.

Why

Unsloth 2026.7.3 installs Torch 2.10.0+cu128. The notebook currently installs unpinned torchcodec, allowing pip to select a newer release that rejects the Torch 2.10 installation during import. Issue #304 reports that torchcodec==0.10.0 is the compatible release.

How

Replace the unversioned install with torchcodec==0.10.0 in both the source notebook and the generated script so Colab and script users resolve the same compatible dependency.

Validation

• Notebook JSON validity test passed.
• Generated Python-script parity test passed.
• Python syntax compilation passed.
• git diff --check passed.
• Verified both artifacts contain exactly one torchcodec==0.10.0 install.

Note

This patch was prepared with assistance from Codex.

[danielhanchen]

Confirmed the Gemma 4 audio install still ends up unpinned, but nb/ and python_scripts/ are regenerated from update_all_notebooks.py, where line 711 is still the plain pip install torchcodec. Could you move the pin there and re-run the generator, and rebase since the branch is conflicting?