architecture.md: fix typo
architecture.md: fix typo

Signed-off-by: Lei Jitang <9ac444d2b5df3db1f31aa1c6462ac8e9e2bde241@huawei.com>

mikebrow/containerd,docker/containerd,crosbymichael/containerd,xiekeyang/containerd,containerd/containerd,estesp/containerd,estesp/containerd,kunalkushwaha/containerd,mikebrow/containerd,dmcgowan/containerd,vdemeester/containerd,AkihiroSuda/containerd,containerd/containerd,vdemeester/containerd,yuexiao-wang/containerd,thaJeztah/containerd,kunalkushwaha/containerd,miaoyq/containerd,miaoyq/containerd,chanezon/containerd,hqhq/containerd,dmcgowan/containerd,Wolphin-project/containerd,lichao-mobanche/containerd,thaJeztah/containerd,crosbymichael/containerd,rajasec/containerd