change readme typo from list to nodes

Made a small mistake in the docs update in PR #7 .  Fixing

Author: logyball

README.md

@@ -58,5 +58,5 @@ In order to search for nodes from particular provisioners, use the `--label` fla
 kubectl nodepools list
 
 # list nodes for a particular karpenter provisioner
-kubectl nodepools list --label 'karpenter.sh/provisioner-name' provisionerA
+kubectl nodepools nodes --label 'karpenter.sh/provisioner-name' provisionerA
 ```