fix docs config typo #175

Job	Run time
test 3.13 on ubuntu-latest	3m 44s
test 3.13 on windows-latest	10m 46s
test 3.13 on macos-latest	4m 57s
test 3.12 on ubuntu-latest	4m 13s
test 3.12 on windows-latest	10m 47s
test 3.12 on macos-latest	5m 10s
tox env type on ubuntu-latest	54s
tox env type on windows-latest	1m 30s
test 3.11 on ubuntu-latest	3m 29s
tox env dev on ubuntu-latest	36s
test 3.11 on windows-latest	11m 1s
tox env dev on windows-latest	1m 7s
test 3.11 on macos-latest	4m 36s
tox env docs on ubuntu-latest	2m 46s
test 3.10 on ubuntu-latest	3m 33s
tox env pkg_meta on ubuntu-latest	19s
test 3.10 on windows-latest	12m 56s
tox env pkg_meta on windows-latest	59s
test 3.10 on macos-latest	4m 52s
test 3.9 on ubuntu-latest	3m 44s
test 3.9 on windows-latest	14m 29s
test 3.9 on macos-latest	5m 6s
test 3.8 on ubuntu-latest	3m 55s
test 3.8 on windows-latest	11m 54s
test 3.8 on macos-latest	4m 37s
	2h 12m 0s

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