MAINTAINERS: Fix F: in "vhost"

We neglected to update MAINTAINERS when we moved files from rename
from docs/system/devices/ to docs/system/devices/virtio/.  Update it now.

Fixes: 487ce6ce99 (docs/system: split VirtIO devices from the rest, 2025-10-16)
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20260603064032.3733394-21-armbru@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
1 file changed