Resolve "Missing Prop Participations on tardiness-field"

Closes #315 (closed)

aleksis/apps/alsijil/frontend/components/coursebook/absences/ManageStudentsDialog.vue

@@ -301,7 +301,7 @@ export default {
               v-bind="documentationPartProps"
               :loading="loading"
               :disabled="loading"
-              :participation="item"
+              :participations="[item]"
               :value="item.tardiness"
               @input="sendToServer([item], 'tardiness', $event)"
             />