Update to NC 16

defaults/main.yml

-nextcloud_version: '15.0.7'
+nextcloud_version: '16.0.0'
 nextcloud_plugins:
   - 'announcementcenter'
   - 'apporder'
@@ -44,8 +44,7 @@ nextcloud_plugins:
   - 'tasks'
   - 'theming'
   - 'twofactor_totp'
-nextcloud_pinned_plugin_versions:
-  deck: '0.5.2'
+nextcloud_pinned_plugin_versions: []
 coturn:
   - secret: 'somerandomstring'
   - realm: 'example.com'