Use correct label for excused field

aleksis/apps/alsijil/templates/alsijil/partials/lesson/tabs/notes.html

@@ -63,7 +63,7 @@
             <td class="center-align">
               <label>
                 {{ form.excused }}
-                <span><span class="hide-on-large-only">{{ form.absent.label }}</span></span>
+                <span><span class="hide-on-large-only">{{ form.excused.label }}</span></span>
               </label>
             </td>
             <td>