update icon

Author: agusmakmun

martor/templates/martor/toolbar.html

@@ -47,7 +47,7 @@
       <input name="markdown-image-upload" class="button" type="file" accept="image/*" title="{% trans 'Upload an Image' %}">
     </div>
     <div class="ui icon button no-border markdown-selector markdown-emoji" title="{% trans 'Insert Emoji' %}">
-      <i class="smile icon"></i>
+      <i class="heart icon"></i>
     </div>
     <div class="ui icon button no-border markdown-selector markdown-direct-mention" title="{% trans 'Direct Mention a User' %} (Ctrl+M)">
       <i class="at icon"></i>