Fix log verbosity calculation #5574

Job	Run time
scarb-metadata compatibility check	42s
check-rust	4m 10s
check-website	13s
build test linux x86-64	3m 30s
doc tests	3m 5s
build test windows x86-64	5m 25s
test linux x86-64 1/8	5m 18s
test linux x86-64 2/8	5m 38s
test linux x86-64 3/8	5m 52s
test linux x86-64 4/8	4m 28s
test linux x86-64 5/8	4m 28s
test linux x86-64 6/8	2m 44s
test linux x86-64 7/8	2m 39s
test linux x86-64 8/8	2m 42s
test windows x86-64 1/8	6m 5s
test windows x86-64 2/8	5m 33s
test windows x86-64 3/8	5m 39s
test windows x86-64 4/8	4m 57s
test windows x86-64 5/8	4m 49s
test windows x86-64 6/8	2m 54s
test windows x86-64 7/8	3m 16s
test windows x86-64 8/8	3m 6s
	1h 27m 13s

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