Update libsass to 0.23.0

[pyup-bot]

This PR updates libsass from 0.21.0 to 0.23.0.

Changelog

0.23.0

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Released on January 6, 2024.

- Follow up the libsass upstream: 3.6.6 --- See the release notes of LibSass
3.6.6__. [:issue:`452` by Anthony Sottile]

0.22.0

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Released on November 12, 2022.

- Remove python 2.x support [:issue:`373` by anthony sottile].
- Remove deprecated ``sassc`` cli [:issue:`379` by anthony sottile].

Links

• PyPI: https://pypi.org/project/libsass
• Changelog: https://data.safetycli.com/changelogs/libsass/
• Repo: https://sass.github.io/libsass-python/