Build release artifacts

Remove two manual steps to edit python.org pages #160

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Run time

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Job	Run time
verify-input	18s
build-android (x86_64)	19m 58s
build-source	1m 19s
build-docs	5m 25s
build-android (aarch64)	4m 1s
test-source	9m 15s
	40m 16s