Bump to a39 #1063

Job	Run time
Shellcheck	5s
Prepare	49s
Dependency	4s
Ruff check and force	6s
Check commit	40s
Create pytest cache for Python 3.11	7s
Create pytest cache for Python 3.12	7s
Run pytest using Python 3.12	24s
Run pytest using Python 3.11	20s
Run mypy	6s
Process test coverage	11s
Process test complexity	6s
Build and publish Python 🐍 distributions 📦 to TestPyPI	19s
	3m 24s

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