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Fix twine version to 6.0.1 to unblock deployment #26

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Run time

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Job	Run time
build-and-test (ubuntu-latest)	43s
build-and-test (ubuntu-24.04)	53s
build-and-test (ubuntu-22.04)	29s
build-and-test (macos-latest)	1m 47s
build-and-test (macos-14)	2m 3s
build-and-test (macos-13)	1m 8s
	7m 3s