Update dependency myst_parser to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
myst_parser	==0.19.2 -> ==2.0.0

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Release Notes

executablebooks/MyST-Parser (myst_parser)

### [`v2.0.0`](https://togithub.com/executablebooks/MyST-Parser/blob/HEAD/CHANGELOG.md#200---2023-06-13) [Compare Source](https://togithub.com/executablebooks/MyST-Parser/compare/v1.0.0...v2.0.0) This release primarily updates core myst-parser dependencies, with some minor changes to parsing behaviour: - ⬆️ UPGRADE: `markdown-it-py` to v3 () - This is mainly a non-breaking change, fixing some edge cases in parsing - See: and - ⬆️ UPGRADE: `linkify-it-py` to v2 () - Also fixes some edge cases in parsing - See: - ⬆️ UPGRADE: Add support for `docutils` v0.20 () - No significant changes, see - ⬆️ UPGRADE: Add support for `sphinx` v7, and remove v5 support () - No significant changes, see - ⬆️ UPGRADE: Remove Python 3.7 support and add testing for Python 3.11 () - 👌 Improve default slug generation for heading anchors, thanks to () - This change makes the slug generation closer to GitHub, in that, starting/ending whitespace will not be stripped. For example, `` # ` a` b `c ` `` will now correctly create the slug `-a-b-c-` and not `a-b-c` - 👌 IMPROVE: Substitution extension () - Allow any value type (including dict, list, datetime) and emit a `myst.substitution` warning for errors in resolving the substitution content. - 🧪 Introduce a gate/check GHA job, thanks to () **Full Changelog**: [v1.0.0...v2.0.0](https://togithub.com/executablebooks/MyST-Parser/compare/v1.0.0...v2.0.0) ### [`v1.0.0`](https://togithub.com/executablebooks/MyST-Parser/blob/HEAD/CHANGELOG.md#100---2023-03-07) [Compare Source](https://togithub.com/executablebooks/MyST-Parser/compare/v0.19.2...v1.0.0) 🎉 **MyST-Parser 1.0.0** 🎉 This changes absolutely nothing in the code, or about the maintenance/release policy of this project. But it does feel about time 😄

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