test

Generate digital attestations for PyPI (PEP 740) #1688

Job	Run time
ubuntu-latest - 3.9	6m 3s
ubuntu-latest - 3.10	6m 14s
ubuntu-latest - 3.11	7m 29s
ubuntu-latest - 3.12	7m 50s
ubuntu-latest - 3.13	7m 46s
ubuntu-latest - 3.13-dev free-threading	9m 20s
ubuntu-latest - 3.14-dev	8m 19s
ubuntu-latest - 3.14-dev free-threading	9m 14s
ubuntu-latest - pypy-3.10	10m 15s
ubuntu-latest - pypy-3.9	9m 22s
macos-latest - 3.13	5m 52s
windows-latest - 3.13	11m 51s
	1h 39m 35s

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