crio.8.md: runroot defaults to /run/containers/storage
crio.8.md: runroot defaults to /run/containers/storage

The recently updated containers/storage is defaultiong to use `/run` as
the runroot; `/var/run` is a symlink to `/run`.

Signed-off-by: Valentin Rothberg <c8d7c67387706f1534261b1aba83f5c355c00ff5@redhat.com>

kubernetes-incubator/cri-o,kubernetes-incubator/ocid,nalind/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,nalind/cri-o,nalind/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/cri-o