Fix typo in cheat sheet #285

Job	Run time
build-mac (macos-11)	20s
build-ubuntu (ubuntu-20.04, Release, gcc, g++)	31s
build-mac (macos-12)	24s
build-ubuntu (ubuntu-20.04, Release, clang, clang++)	21s
build-ubuntu (ubuntu-20.04, Debug, gcc, g++)	31s
build-win (windows-2019, Visual Studio 16 2019)	19s
build-ubuntu (ubuntu-20.04, Debug, clang, clang++)	19s
build-win (windows-2022, Visual Studio 17 2022)	20s
build-ubuntu (ubuntu-22.04, Release, gcc, g++)	31s
build-ubuntu (ubuntu-22.04, Release, clang, clang++)	21s
build-ubuntu (ubuntu-22.04, Debug, gcc, g++)	31s
build-ubuntu (ubuntu-22.04, Debug, clang, clang++)	19s
ceres	1s
codecov	1s
cppcheck	1s
autodiff	1s
pybind11-cmake	1s
pybind11-pip	1s
valgrind	1s
	4m 54s

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