[FIX] website_event: add missing translation term

Was added at 78014ff3

Closes #21372

addons/website_event/i18n/website_event.pot

@@ -424,6 +424,11 @@ msgstr ""
 msgid "Register Now"
 msgstr ""
 
+#. module: website_event
+#: model:ir.ui.view,arch_db:website_event.event_description_full
+msgid "Registration for this event is now closed"
+msgstr ""
+
 #. module: website_event
 #: model:ir.ui.view,arch_db:website_event.404
 msgid "Return to the event list."