Prevent linking to unpublished content

Sources/Generator/Generators/PageContentGenerator.swift

@@ -361,6 +361,10 @@ struct PageContentGenerator {
             // Remove link since the page can't be found
             return ""
         }
+        guard linkedPage.state == .standard else {
+            // Prevent linking to unpublished content
+            return ""
+        }
         var content = [PageLinkTemplate.Key: String]()
         
         content[.title] = linkedPage.title(for: language)