add link to add to google calendar on event section view

Author: CrisKrus

apps/events/templates/events/includes/event-section.html

@@ -20,6 +20,7 @@ <h1 class="title is-3">
             </h1>
             <div class="event-date">
               <i class="far fa-calendar-alt"></i> {{ event.start_date|as_date }}
+              <a target="_blank" href="https://www.google.com/calendar/render?action=TEMPLATE&text={{ event.name }}&details={{ event.description }}&location={{ event.venue }}&dates={{ event.start_datetime | date:'Ymd\THis\Z' }}%2F{{ event.get_end_datetime | date:'Ymd\THis\Z' }}">Añadir a Google Calendar</a>
             </div>
             {% if event.venue %}
               <div class="event-location">