fix spelling error in docs #626

Job	Run time
CMake MINGW	1m 24s
CMake/Android/So/ARMv8/Release	40s
CMake/Android/So/X86/Release	25s
CMake/Android/So/X64/Release	14s
CMake/Windows/Dll/X86/Release	2m 5s
CMake/Windows/Dll/X64/Release	1m 51s
CMake/Windows/Dll/ARMv8/Release	1m 10s
CMake/Linux/So/X64/Release	36s
CMake/MacOSX/So/X64/Release	32s
CMake/MacOSX/Framework/X64/Release	1m 17s
CMake/iOS/Dll/arm64/Release	41s
CMake/iOS/Framework/arm64/Release	29s
CMake/Windows/Lib/X86/Release	2m 15s
CMake/Windows/Lib/X64/Release	2m 33s
CMake/Windows/Lib/armv8/Release	1m 30s
CMake/Linux/Lib/X64/Release	58s
CMake/MacOSX/Lib/X64/Release	1m 17s
CMake/iOS/Lib/arm64/Release	41s
CMake/Android/Lib/ARMv8/Release	25s
CMake/Android/Lib/X86/Release	15s
CMake/Android/Lib/X64/Release	43s
CMake/CustomModes/Linux/Lib/X64/Release	1m 4s
CMake/AssertionsFuzz/Windows/Lib/X64/Release	3m 25s
CMake/AssertionsFuzz/Linux/Lib/X64/Release	57s
CMake/AssertionsFuzz/MacOSX/Lib/X64/Release	1m 17s
Test build with CMake 3.16.0	59s
	29m 43s

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