Furo theme does not handle large output from nbsphinx

[saurabheights]

Checklist

• I have searched for similar issues.
• For Python issues, I have tested with the latest development wheel.
• I have checked the release documentation and the latest documentation (for master branch).

Describe the issue

The notebook code output for http://www.open3d.org/docs/latest/tutorial/geometry/voxelization.html#Voxel-carving is not truncated as in http://www.open3d.org/docs/latest/tutorial/Advanced/voxelization.html#Voxel-carving.

The change was due to removal of css overrides in https://github.com/isl-org/Open3D/pull/6470/files#diff-bffe98820c75f17b7530290680a5349d714b873c9fde7051d3b10f272fec2196L17

Steps to reproduce the bug

Rebuild docs and check locally.

Error message

No response

Expected behavior

No response

Open3D, Python and System information

- Operating system: Ubuntu 20.04 / macOS 10.15 / Windows 10 64-bit
- Python version: Python 3.8 / output from `import sys; print(sys.version)`
- Open3D version: output from python: `print(open3d.__version__)`
- System architecture: x86 / arm64 / apple-silicon / jetson / rpi
- Is this a remote workstation?: yes or no
- How did you install Open3D?: pip / conda / build from source
- Compiler version (if built from source): gcc 7.5 / clang 7.0

Additional information

I will push the fix soon.