Update to 15.0.4 and bring back bookmark fulltextsearch

defaults/main.yml

-nextcloud_version: '15.0.2'
+nextcloud_version: '15.0.4'
 nextcloud_plugins:
   - 'announcementcenter'
   - 'apporder'
   - 'audioplayer'
   - 'bookmarks'
+  - 'bookmarks_fulltextsearch'
   - 'bruteforcesettings'
   - 'calendar'
   - 'circles'
@@ -49,5 +50,4 @@ coturn:
 
 nextcloud_plugins_off:
   - 'caniupdate'
-  - 'bookmarks_fulltextsearch'
   - 'twainwebscan'