arm64 executable in 'mac-intel' release file

Description: The binary inside the mac-intel tarball for release v6.25.0-mo1 is compiled for arm64 instead of x86_64. This causes a "Bad CPU type in executable" error on Intel Macs. Proof: `> file ./xmrig-v6.25.0-mo1-mac-intel/xmrig` returns `Mach-O 64-bit executable arm64`.