Fix du lien d'école dans la navbar

templates/nav_bar.html

@@ -25,7 +25,7 @@
     </ul>
 	<ul class="navbar-nav ml-auto">
         {% if request.user.userprofile.school %}
-        <li class="nav-item {% if school %}active{% endif %}"><a class="nav-link" href="{% url 'users:school' request.user.userprofile.school.pk %}"><i class="fas fa-graduation-cap"></i> Mon école</a></li>
+        <li class="nav-item {% if school %}active{% endif %}"><a class="nav-link" href="{% url 'users:school' request.user.userprofile.school.group.pk %}"><i class="fas fa-graduation-cap"></i> Mon école</a></li>
         {% endif %}
         <li class="nav-item {% if settings %}active{% endif %}"><a class="nav-link" href="{% url 'settings:index' %}"><i class="fas fa-cogs"></i> Administration</a></li>
 	{% if request.user.is_authenticated %}