ucp 3.0.2 release notes: dereference cni_ipinip_mtu
ucp 3.0.2 release notes: dereference cni_ipinip_mtu

this knob does not exist in UCP 3.0.2

Signed-off-by: Trapier Marshall <4fb0bc169ac8ff7fffe18129ef52aefd3fb67d5a@docker.com>

londoncalling/docker.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io