Update nbsphinx requirement from ~=0.8.10 to ~=0.8.12

Created by: dependabot[bot]

Updates the requirements on nbsphinx to permit the latest version.

Release notes

Sourced from nbsphinx's releases.

nbsphinx 0.8.12

https://pypi.org/project/nbsphinx/0.8.12/

• Implement "link" galleries (without nested sub-documents)

Changelog

Sourced from nbsphinx's changelog.

Version 0.8.12 -- 2023-01-19 -- PyPI__ -- diff__

• Implement "link" galleries (without nested sub-documents)

__ https://pypi.org/project/nbsphinx/0.8.12/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.11...0.8.12

Version 0.8.11 -- 2022-12-29 -- PyPI__ -- diff__

• LaTeX: apply code cell border style to all code blocks

__ https://pypi.org/project/nbsphinx/0.8.11/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.10...0.8.11

Version 0.8.10 -- 2022-11-13 -- PyPI__ -- diff__

• Fix handling of source_suffix
• A few LaTeX fixes

__ https://pypi.org/project/nbsphinx/0.8.10/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.9...0.8.10

Version 0.8.9 -- 2022-06-04 -- PyPI__ -- diff__

• CSS: support tables in widgets
• Avoid empty "raw" directive

__ https://pypi.org/project/nbsphinx/0.8.9/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.8...0.8.9

Version 0.8.8 -- 2021-12-31 -- PyPI__ -- diff__

• Support for the sphinx_codeautolink extension
• Basic support for the text builder

__ https://pypi.org/project/nbsphinx/0.8.8/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.7...0.8.8

Version 0.8.7 -- 2021-08-10 -- PyPI__ -- diff__

• Fix assertion error in LaTeX build with Sphinx 4.1.0+

__ https://pypi.org/project/nbsphinx/0.8.7/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.6...0.8.7

Version 0.8.6 -- 2021-06-03 -- PyPI__ -- diff__

• Support for Jinja2 version 3

__ https://pypi.org/project/nbsphinx/0.8.6/ __ https://github.com/spatialaudio/nbsphinx/compare/0.8.5...0.8.6

Version 0.8.5 -- 2021-05-12 -- PyPI__ -- diff__

• Freeze Jinja2 version to 2.11 (for now, until a bugfix is found)
• Add theme_comparison.py tool for creating multiple versions (with different HTML themes) of the docs at once

... (truncated)

Commits

• 14c86de Release 0.8.12
• 7c90840 DOC: Hide main TOC in <details>, add site usage instructions
• 80d68fb DOC: Remove explicit ipython dep from requirements.txt
• 1c33914 DOC: Add note about using sphinx-gallery<0.11
• 23869df DOC: Separate notebooks for different gallery types
• 13eeb84 Fix missing spaces in thumbnail titles
• 5935ff3 Implement nbsphinx-link-gallery tag/metadata
• bb8633e Refactor using DummyTocTree
• 1d342bb Implement NbLinkGallery directive
• 59c0498 DOC: use docutils from SVN
• Additional commits viewable in compare view

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