clarify fontawesome macro

hiboo/templates/macros.html

@@ -12,7 +12,14 @@
   </div>
   {% endif %}
   <div>
-    <i class="fas fa-{{ {"signup": "address-card", "create": "plus", "transition": "recycle", "password": "lock", "2fa": "qrcode"}[event.category] }} bg-blue"></i>
+    <i class="fas fa-{{ {
+        "signup": "address-card",
+        "create": "plus",
+        "transition": "recycle",
+        "password": "lock",
+        "enable 2fa": "qrcode",
+        "disable 2fa": "qrcode"
+    }[event.category] }} bg-blue"></i>
     <div class="timeline-item">
       <span class="time"><i class="fas fa-clock"></i> {{ event.created_at.time().strftime("%H:%M") }}</span>
       <h3 class="timeline-header">