refactor: Formatting

src/fellchensammlung/templates/fellchensammlung/header.html

@@ -19,7 +19,7 @@
                 <p>{{ user.username }}</p>
                 <form action="{% url 'logout' %}" method="post">
                     {% csrf_token %}
-                    <button type="submit">{% translate "Ausloggen"%}</button>
+                    <button type="submit">{% translate "Ausloggen" %}</button>
                 </form>
             </div>
         {% else %}