Update pre-commit hook jackdewinter/pymarkdown to v0.9.39 #6301

Job	Run time
Dependency	5s
Cache identify	5s
Shellcheck	6s
Prepare	27s
Ruff check and force	8s
Check commit	22s
Run pytest using Python 3.13	26s
Run pytest using Python 3.14	19s
Run mypy	12s
Process test coverage	15s
Process test complexity	13s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
	2m 48s

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