jupyter-book/mystmd: mystmd@1.8.1

(full changelog) Enhancements made Add support for remote parts #2687 (@choldgraf, @agoose77, @stefanv) Bugs fixed Fix URL generation bug in toc directive #2702 (@choldgraf, @rowanc1) Fix extends configuration with parts #2690 (@choldgraf, @agoose77) Make citation parsing less aggressive #2684 (@choldgraf, @rowanc1, @stefanv) Documentation improvements Document more toc functionality #2686 (@choldgraf, @bsipocz) Document toc directive #2672 (@choldgraf, @stefanv) 📖 Update release process for 'mystmd' to include PyPI and Conda #2667 (@rowanc1, @choldgraf) Other merged PRs 🚀 Release #2666 (@choldgraf) 🚀 Release #2665 (@choldgraf) Contributors to this release The following people contributed discussions, new ideas, code and documentation contributions, and review. See our definition of contributors. (GitHub contributors page for this release) @agoose77 (activity) | @bsipocz (activity) | @choldgraf (activity) | @rowanc1 (activity) | @stefanv (activity) | @yuvipanda (activity)