turn to categories

event_template.md

@@ -2,7 +2,7 @@
 title: "{{ event.name }}"
 date: "{{ event.begin }}" #2021-06-10T10:46:33+02:00
 draft: false
-category: "calendar"
+categories: "calendar"
 event_begin: "{{ event.begin }}"
 event_end: "{{ event.end }}"
 duration: "{{ event.duration }}"
@@ -18,4 +18,4 @@ location: "{{ event.location }}"
 
 {{ event.description }}
 
-{% endif %}
+{% endif %}