Typo fix README.md #5917

Job	Run time
tests (ubuntu-latest, 3.8, data_dependency)	34s
tests (ubuntu-latest, 3.8, path_filtering)	27s
tests (ubuntu-latest, 3.8, erc)	33s
tests (ubuntu-latest, 3.8, find_paths)	26s
tests (ubuntu-latest, 3.8, flat)	26s
tests (ubuntu-latest, 3.8, interface)	35s
tests (ubuntu-latest, 3.8, printers)	1m 11s
tests (ubuntu-latest, 3.8, slither_config)	32s
tests (ubuntu-latest, 3.8, upgradability)	58s
tests (ubuntu-latest, 3.12, data_dependency)	35s
tests (ubuntu-latest, 3.12, path_filtering)	28s
tests (ubuntu-latest, 3.12, erc)	30s
tests (ubuntu-latest, 3.12, find_paths)	27s
tests (ubuntu-latest, 3.12, flat)	28s
tests (ubuntu-latest, 3.12, interface)	27s
tests (ubuntu-latest, 3.12, printers)	59s
tests (ubuntu-latest, 3.12, slither_config)	25s
tests (ubuntu-latest, 3.12, upgradability)	53s
	10m 54s

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