chore(README): update install section for Beta.2
chore(README): update install section for Beta.2

bacongobbler/helm,jascott1/helm,rbwsam/helm,jascott1/helm,technosophos/deployment-manager,flynnduism/helm,yan234280533/helm,flynnduism/helm,appscode/helm,qwangrepos/helm,michelleN/deployment-manager,thomastaylor312/helm,kdada/helm,adamreese/helm,eicnix/helm,bacongobbler/helm,fibonacci1729/helm,bradj/helm,michelleN/deployment-manager,technosophos/deployment-manager,technosophos/deployment-manager,technosophos/k8s-helm,helm/helm,michelleN/deployment-manager,SlickNik/helm,FengyunPan/helm,appscode/helm,adamreese/deployment-manager,bradj/helm,yan234280533/helm,technosophos/k8s-helm,thomastaylor312/helm,sushilkm/helm,fibonacci1729/helm,adamreese/deployment-manager,kdada/helm,FengyunPan/helm,helm/helm,adamreese/deployment-manager,adamreese/deployment-manager,adamreese/helm,SlickNik/helm,qwangrepos/helm,iamzhout/helm,michelleN/deployment-manager,eicnix/helm,sushilkm/helm,rbwsam/helm,technosophos/deployment-manager,adamreese/deployment-manager,iamzhout/helm,technosophos/deployment-manager