docs: Update description of the host-model CPU mode
docs: Update description of the host-model CPU mode

Signed-off-by: Jiri Denemark <62bdf77dc47919a4d59a91822129d14633cfca81@redhat.com>

crobinso/libvirt,datto/libvirt,nertpinx/libvirt,jardasgit/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,eskultety/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,jfehlig/libvirt,zippy2/libvirt,libvirt/libvirt,olafhering/libvirt,andreabolognani/libvirt,libvirt/libvirt,nertpinx/libvirt,olafhering/libvirt,datto/libvirt,jfehlig/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,libvirt/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,eskultety/libvirt,olafhering/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,libvirt/libvirt,datto/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,andreabolognani/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt,taget/libvirt,taget/libvirt,zippy2/libvirt,taget/libvirt,crobinso/libvirt,eskultety/libvirt,eskultety/libvirt,taget/libvirt,datto/libvirt,taget/libvirt,jardasgit/libvirt,crobinso/libvirt,olafhering/libvirt,datto/libvirt,fabianfreyer/libvirt