Cmake fails to find packages(curl, etc) if VCPKG_DEFAULT_TRIPLET is not set to x64-windows-static. If not set, cmake sets VCPKG_TARGET_TRIPLET to x64-windows instead of x64-windows-static. Since curl was installed using x64-windows-static in vcpkg, cmake fails to find the package. Adding set VCPKG_DEFAULT_TRIPLET to x64-windows-static explicitly in build instructions so that it is helpful to avoid cmake error(could not find CURL)
