readme: update installation
readme: update installation

jojohappy/falcon-plus,taomaree/falcon-plus,jojohappy/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus,taomaree/falcon-plus,jojohappy/falcon-plus,jojohappy/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus,open-falcon/falcon-plus,taomaree/falcon-plus,jojohappy/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus,jojohappy/falcon-plus,open-falcon/falcon-plus