Update environment message in cluster up command

Author: deliahu

cli/cmd/cluster.go

@@ -167,7 +167,7 @@ var _upCmd = &cobra.Command{
 			exit.Error(ErrorClusterUp(out + helpStr))
 		}
 
-		fmt.Printf(console.Bold("\nan environment named \"%s\" has been configured for this cluster; append `--env %s` to cortex commands to reference it, or set it as your default with `cortex env default %s`\n"), _flagClusterEnv, _flagClusterEnv, _flagClusterEnv)
+		fmt.Printf(console.Bold("\nan environment named \"%s\" has been configured for this cluster; append `--env %s` to cortex commands to connect to it (e.g. `cortex deploy --env %s`), or set it as your default with `cortex env default %s`\n"), _flagClusterEnv, _flagClusterEnv, _flagClusterEnv, _flagClusterEnv)
 	},
 }