Bump to a2, a1 exists #5321

Job	Run time
Shellcheck	4s
Dependency	4s
Prepare	1m 1s
Ruff check and force	18s
Check commit	34s
Create pytest cache for Python 3.13.0	15s
Create pytest cache for Python 3.12	5s
Run pytest using Python 3.13.0	21s
Run pytest using Python 3.12	17s
Run mypy	19s
Process test coverage	17s
Process test complexity	13s
Build and publish Python 🐍 distributions 📦 to TestPyPI	32s
	4m 20s

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