docs: add Deckhouse to the list of adopters
docs: add Deckhouse to the list of adopters

Signed-off-by: Dmitry Shurupov <a5c906ed6c8fd7e9814938299add98eba0370d7b@flant.com>

containerd/containerd,thaJeztah/containerd,containerd/containerd,estesp/containerd,mikebrow/containerd,thaJeztah/containerd,estesp/containerd,mikebrow/containerd