Fix typo

aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue

@@ -250,7 +250,7 @@ export default {
     initPatchData() {
       return {
         id: this.selectedEvent.meta.id,
-        subject: this.selectedEvent.meta.subject?,
+        subject: this.selectedEvent.meta.subject,
         teachers: this.selectedEvent.meta.teachers,
         rooms: this.selectedEvent.meta.rooms,
         cancelled: this.selectedEvent.meta.cancelled,