update _sho.jsonbilder

Author: momo3404

app/views/api/v2/plans/_show.json.jbuilder

@@ -76,6 +76,7 @@ unless @minimal
 
         json.array! q_and_a do |item|
           json.title item[:title]
+          json.section item[:section]
           json.question item[:question]
           json.answer item[:answer]
         end