⬆️ Update markdown-it-py v4 #1840

Job	Run time
pre-commit	47s
pytest: py3.10, sphinx>=8,<9, on ubuntu-latest	8s
Check myst-docutils install (0.20)	17s
Check myst-docutils install (0.19)	10s
pytest: py3.11, sphinx>=8,<9, on ubuntu-latest	9s
Check myst-docutils install (0.21)	8s
pytest: py3.13, sphinx>=8,<9, on ubuntu-latest	9s
pytest: py3.12, sphinx>=8,<9, on ubuntu-latest	14s
pytest: py3.10, sphinx>=7,<8, on ubuntu-latest	8s
pytest: py3.10, sphinx>=7,<8, on windows-latest	30s
check	3s
Publish myst-parser to PyPi	0s
Publish myst-docutils to PyPi	0s
	2m 43s

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