Fix link issues

app/templates/admin/user.html.j2

@@ -5,7 +5,7 @@
   <div class="row">
     <div class="col s12 l2">
       <p>&nbsp;</p>
-      <img src="{{ url_for('users.profile_avatar', user_id=user.id) }}" alt="user-image" class="circle responsive-img">
+      <img src="{{ url_for('users.user_avatar', user_id=user.id) }}" alt="user-image" class="circle responsive-img">
     </div>
     <div class="col s12 l10">
       <h1 id="title">{{ title }}</h1>