Use emoji for Shownote heading for better search result in header

Author: yasulab

app/controllers/podcasts_controller.rb

@@ -34,7 +34,6 @@ def show
   def convert_shownote(content)
     shownote = <<~HTML
       <h2 id='shownote'>
-        <!--<a href='#shownote'><i class="fa-solid fa-message-pen" style='color: #2275ca;'></i></a>-->
         <a href='#shownote'>🎤</a>
         Shownote − 話したこと
       </h2>