Bump sigstore/gh-action-sigstore-python from 2.1.1 to 3.0.0 (#1392) #565

Job	Run time
Build sdist and wheels	18s
Test macOS (macos-latest, 3.10)	4m 44s
Test Windows (windows-latest, 3.10)	8m 21s
Test ubuntu-latest with Python pypy3.10	11m 21s
Test macOS (macos-latest, 3.11)	4m 57s
Test Windows (windows-latest, 3.11)	7m 55s
Test ubuntu-22.04 with Python 3.13	5m 24s
Test macOS (macos-latest, 3.12)	5m 40s
Test Windows (windows-latest, 3.12)	8m 31s
Test macOS (macos-13, 3.10)	8m 6s
Test macOS (macos-13, 3.11)	11m 11s
Test macOS (macos-13, 3.12)	7m 57s
Build Alpine-based Docker images	3m 27s
Build Ubuntu-based Docker image	9m 16s
Deploy artifacts to PyPI	0s
Create GitHub release	0s
	1h 37m 8s

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