docs(*): use '--namespace' instead of '-n'
docs(*): use '--namespace' instead of '-n'

Fixes #1393

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