Update actions/github-script action to v9 #820

Job	Run time
Shellcheck	6s
Ruff check and force	10s
Check commit	41s
Run pytest using Python 3.14	13s
Run pytest using Python 3.13	14s
Run mypy	15s
Process test coverage	13s
Build and publish Python 🐍 distributions 📦 to TestPyPI	8s
Process test complexity	8s
	2m 8s

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