⬆️ Update markdown-it-py v4 #1841

Job	Run time
pre-commit	15s
pytest: py3.12, sphinx>=8,<9, on ubuntu-latest	18s
pytest: py3.10, sphinx>=8,<9, on ubuntu-latest	22s
pytest: py3.11, sphinx>=8,<9, on ubuntu-latest	20s
Check myst-docutils install (0.20)	13s
Check myst-docutils install (0.19)	15s
Check myst-docutils install (0.21)	15s
pytest: py3.10, sphinx>=7,<8, on ubuntu-latest	18s
pytest: py3.13, sphinx>=8,<9, on ubuntu-latest	20s
pytest: py3.10, sphinx>=7,<8, on windows-latest	55s
check	5s
Publish myst-parser to PyPi	0s
Publish myst-docutils to PyPi	0s
	3m 36s

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