集計で独裁者以外がほとんど検索条件を指定できないバグ (#444) (#452)

Reviewed-on: #452
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/app/services/counts_table_export.rb

@@ -253,7 +253,7 @@ class CountsTableExport
   end
 
   def summary_value(value, index, page)
-    return '********' if value == CountsAxes::MASKED_VALUE
+    return CountsAxes::MASKED_TEXT if value == CountsAxes::MASKED_VALUE
 
     field = @query.axes.all.fetch(index).fetch('field')
     return @labels.fetch('bot', '') if field == 'user' && value.nil?