chore(deps): update dependency mdx_truly_sane_lists to v1.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mdx_truly_sane_lists	==1.2 -> ==1.3

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Release Notes

radude/mdx_truly_sane_lists

### [`v1.3`](https://togithub.com/radude/mdx_truly_sane_lists/releases/tag/1.3) [Compare Source](https://togithub.com/radude/mdx_truly_sane_lists/compare/1.2...1.3) - Python-Markdown 3.4 compatibility - Support for [Definition lists](https://python-markdown.github.io/extensions/definition_lists/) if `def_list` extension has been enabled

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