README: bump quickstart snippet to v0.17.3

Author: marquiz

README.md

@@ -12,7 +12,7 @@ features and system configuration!
 #### Quick-start – the short-short version
 
 ```bash
-$ kubectl apply -k "https://github.com/kubernetes-sigs/node-feature-discovery/deployment/overlays/default?ref=v0.17.2"
+$ kubectl apply -k "https://github.com/kubernetes-sigs/node-feature-discovery/deployment/overlays/default?ref=v0.17.3"
   namespace/node-feature-discovery created
   customresourcedefinition.apiextensions.k8s.io/nodefeaturegroups.nfd.k8s-sigs.io created
   customresourcedefinition.apiextensions.k8s.io/nodefeaturerules.nfd.k8s-sigs.io created