Fix docs #876

Job	Run time
test_c_linux (0, x64)	54s
build_python_27 (ubuntu-20.04, yes)	2m 22s
test_c_linux (0, x32)	1m 14s
build_python_27 (ubuntu-20.04, no)	2m 19s
test_c_linux (1, x64)	53s
build (3.6, yes, ubuntu-20.04)	2m 25s
build_python_27 (windows-latest, yes)	3m 45s
test_c_linux (1, x32)	1m 19s
build (3.6, no, ubuntu-20.04)	2m 15s
build_python_27 (windows-latest, no)	4m 0s
build (3.7, yes, ubuntu-20.04)	2m 23s
mypy	18s
build (3.7, no, ubuntu-20.04)	2m 20s
test_c_windows (x64)	1m 5s
build (3.8, yes, ubuntu-20.04)	2m 6s
test_c_windows (win32)	1m 11s
build (3.8, no, ubuntu-20.04)	2m 38s
build (3.9, yes, ubuntu-20.04)	2m 10s
build (3.9, no, ubuntu-20.04)	2m 4s
build (3.10, yes, ubuntu-20.04)	2m 4s
build (3.10, no, ubuntu-20.04)	2m 7s
build (3.11, yes, ubuntu-20.04)	2m 15s
build (3.11, no, ubuntu-20.04)	1m 47s
build (3.12, yes, ubuntu-20.04)	2m 0s
build (3.12, no, ubuntu-20.04)	1m 55s
build (3.12, yes, macos-12)	2m 47s
build (3.12, no, windows-latest)	4m 1s
build (3.12, yes, windows-latest)	4m 10s
build (pypy2.7, no, ubuntu-latest)	1m 32s
build (pypy3.9, no, ubuntu-latest)	1m 36s
	1h 3m 55s

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