[Docs] Clarify `node create` help text about cluster reference (#808)

cmd/node/nodeCreate.go

@@ -72,7 +72,7 @@ func NewCmdNodeCreate() *cobra.Command {
 	if err := cmd.RegisterFlagCompletionFunc("role", util.ValidArgsNodeRoles); err != nil {
 		l.Log().Fatalln("Failed to register flag completion for '--role'", err)
 	}
-	cmd.Flags().StringP("cluster", "c", k3d.DefaultClusterName, "Select the cluster that the node shall connect to.")
+	cmd.Flags().StringP("cluster", "c", k3d.DefaultClusterName, "Cluster URL or k3d cluster name to connect to.")
 	if err := cmd.RegisterFlagCompletionFunc("cluster", util.ValidArgsAvailableClusters); err != nil {
 		l.Log().Fatalln("Failed to register flag completion for '--cluster'", err)
 	}

docs/usage/commands/k3d_node_create.md

@@ -13,7 +13,7 @@ k3d node create NAME [flags]
 ### Options
 
 ```
-  -c, --cluster string           Select the cluster that the node shall connect to. (default "k3s-default")
+  -c, --cluster string           Cluster URL or k3d cluster name to connect to. (default "k3s-default")
   -h, --help                     help for create
   -i, --image string             Specify k3s image used for the node(s) (default "docker.io/rancher/k3s:v1.21.4-k3s2")
       --k3s-node-label strings   Specify k3s node labels in format "foo=bar"