kubeadm: improve ux on infoMsg kubeconfig

cmd/kubeadm/app/phases/kubeconfig/kubeconfig.go

@@ -271,7 +271,7 @@ func createKubeConfigFileIfNotExists(outDir, filename string, config *clientcmda
 	// kubeadm doesn't validate the existing kubeconfig file more than this (kubeadm trusts the client certs to be valid)
 	// Basically, if we find a kubeconfig file with the same path; the same CA cert and the same server URL;
 	// kubeadm thinks those files are equal and doesn't bother writing a new file
-	fmt.Printf("[kubeconfig] Using existing up-to-date kubeconfig file: %q\n", kubeConfigFilePath)
+	fmt.Printf("[kubeconfig] Using existing kubeconfig file: %q\n", kubeConfigFilePath)
 
 	return nil
 }