Update kconfig.md to reflect that defconfig (instead of mini-config) file is generated by running "make savedefconfig". Signed-off-by: Jonathan Zhang <jonzhang@fb.com> Change-Id: I4075e5b51e3c504eaad25e3abfc52ba593364ee9 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43973 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>