fix error display string

Author: SergeyKanzhelev

layouts/shortcodes/feature-state.html

@@ -3,9 +3,9 @@
 {{ $for_k8s_version := .Get "for_k8s_version" | default (.Page.Param "version")}}
 {{ $is_valid := strings.Contains $valid_states $state }}
 {{ if not $is_valid }}
-{{ errorf "%q is not a valid feature-state, use one of %q" $valid_states }}
+{{ errorf "%q is not a valid feature-state, use one of %q" $state $valid_states }}
 {{ else }}
 <div style="margin-top: 10px; margin-bottom: 10px;">
 <b>FEATURE STATE:</b> <code>Kubernetes {{ $for_k8s_version }} [{{ $state }}]</code>
 </div>
-{{ end }}
+{{ end }}