Fix typo in setup-chromedriver.sh #520

Job	Run time
test (ubuntu-latest, now, current)	1m 0s
test (ubuntu-latest, now, 114.0.5735.90)	1m 0s
test (ubuntu-20.04, now, current)	55s
test (ubuntu-20.04, now, 114.0.5735.90)	52s
test (macos-latest, now, current)	1m 28s
test (macos-latest, now, 114.0.5735.90)	1m 54s
test (macos-11, now, current)	1m 42s
test (macos-11, now, 114.0.5735.90)	2m 5s
test_default_version (ubuntu-latest, now)	47s
test_default_version (ubuntu-20.04, now)	1m 2s
test_default_version (macos-latest, now)	1m 26s
test_default_version (macos-11, now)	1m 42s
	15m 53s

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