minor: add profiling notes for Visual Studio #124

Job	Run time
CMake Ubuntu Basic Build	4m 16s
CMake Cross-Platform (Spaces in Path) (macos-latest, Unix Makefiles, macOS)	58s
CMake Cross-Platform (Spaces in Path) (ubuntu-latest, Unix Makefiles, Linux)	1m 27s
CMake Cross-Platform (Spaces in Path) (windows-latest, NMake Makefiles, Windows NMake)	1m 17s
CMake macOS ARM64 (Apple Silicon)	2m 27s
CMake Windows VS2022 (MSVC x64)	5m 57s
CMake Windows VS2022 (MinGW)	4m 51s
CMake Windows VS2022 (MSVC ARM64)	55s
CMake Windows VS2022 (Clang-CL)	4m 54s
CMake Windows VS2022 (MSVC x64 (No ZSTD_BUILD_TESTS))	36s
CMake Windows VS2022 (MSVC Win32)	6m 34s
CMake Windows VS2022 (Clang-CL AVX2)	5m 9s
	39m 21s

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