Bump sigstore/gh-action-sigstore-python from 1.2.3 to 2.1.0 #128

Job	Run time
Linter	1m 19s
Test (3.7, ubuntu, false)	37s
Test (3.7, macos, false)	1m 16s
Test (3.7, windows, false)	2m 50s
Test (3.7, Y, ubuntu, false)	44s
Test (3.8, ubuntu, false)	51s
Test (3.8, macos, false)	1m 9s
Test (3.8, windows, false)	1m 53s
Test (3.8, Y, ubuntu, false)	31s
Test (3.9, ubuntu, false)	42s
Test (3.9, macos, false)	1m 52s
Test (3.9, windows, false)	3m 15s
Test (3.9, Y, ubuntu, false)	39s
Test (3.10, ubuntu, false)	40s
Test (3.10, macos, false)	1m 9s
Test (3.10, windows, false)	1m 55s
Test (3.10, Y, ubuntu, false)	28s
Test (3.11, ubuntu, false)	40s
Test (3.11, macos, false)	48s
Test (3.11, windows, false)	3m 6s
Test (3.11, Y, ubuntu, false)	26s
Test (pypy-3.9, Y, false, ubuntu)	1m 15s
Test (pypy-3.8, Y, false, ubuntu)	1m 22s
Test (3.12-dev, true, ubuntu)	51s
Test (3.12-dev, Y, true, ubuntu)	38s
Tests status	2s
Pre-Deploy	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Tarball	0s
Deploy	0s
	30m 58s

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