chore: Fix retired os to re-enable workflow (#57) #68

Job	Run time
test-contract-tests	2m 44s
test-packaging	4m 20s
test-platforms-and-versions (ubuntu-latest, 8)	2m 13s
test-platforms-and-versions (ubuntu-latest, 11)	2m 34s
test-platforms-and-versions (ubuntu-latest, 17)	2m 44s
test-platforms-and-versions (ubuntu-latest, 19)	2m 20s
	16m 55s

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