Fix getting python release version #402

Job	Run time
sanity	15s
unittests	9s
focal, broken / build debs	2m 18s
focal, broken, cont-on-err / build debs	3m 32s
jammy, good, verbose=true / build debs	3m 17s
bookworm, good, verbose=bloom / build debs	4m 0s
jammy, good, timeout=3 / build debs	3m 14s
bookworm squash / deploy	15s
jammy push / deploy	7s
	17m 7s

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