chore: Remove static URLs from the documentation (#5461)

app/views/api/v1/accounts/articles/_article.json.jbuilder

@@ -9,6 +9,7 @@ json.meta article.meta
 json.category do
   json.id article.category_id
   json.name article.category.name
+  json.slug article.category.slug
 end
 
 if article.portal.present?