Update architecture_design.md
Update architecture_design.md

hotrannam/ringpop,Collin-V/ringpop,esatterwhite/skyring,tomasdiez/ringpop,uber/ringpop-node,sasa233/ringpop,uber/ringpop,uber-node/ringpop-node,hj3938/ringpop,esatterwhite/skyring,uber/ringpop-node,uber-node/ringpop-node