package/xmrig: bump version to 6.25.0
Changelog: https://github.com/xmrig/xmrig/blob/v6.25.0/CHANGELOG.md
Added armv8 and riscv64 (riscv32 is broken) as supported archs.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>