fix: Use proper image sizes for session speaker avatar (#3765)

Author: iamareebjamal

app/templates/components/public/session-item.hbs

@@ -22,7 +22,7 @@
         <div class="left floated eleven wide column">
           <div class="session-speakers">
             {{#each session.speakers as |speaker|}}
-              <img alt="speaker" class="ui mini avatar image" src="{{if speaker.thumbnailImageUrl speaker.thumbnailImageUrl (if speaker.photoUrl speaker.photoUrl '/images/placeholders/avatar.png')}}">
+              <img alt="speaker" class="ui mini avatar image" src="{{if speaker.iconImageUrl speaker.iconImageUrl (if speaker.photoUrl speaker.photoUrl '/images/placeholders/avatar.png')}}">
             {{/each}}
           </div>
         </div>
@@ -44,7 +44,7 @@
   <div class="content">
     {{#each session.speakers as |speaker|}}
       <div class="ui divider"></div>
-      <img alt="speaker" class="ui tiny avatar image" src="{{if speaker.iconImageUrl speaker.iconImageUrl (if speaker.photoUrl speaker.photoUrl '/images/placeholders/avatar.png')}}">
+      <img alt="speaker" class="ui tiny avatar image" src="{{if speaker.thumbnailImageUrl speaker.thumbnailImageUrl (if speaker.photoUrl speaker.photoUrl '/images/placeholders/avatar.png')}}">
       <p>
         <br>
         {{speaker.name}}