fix: translation only applied on app start

* the problem was that with gettext the translations for facets
  have been only be calculated on boot time.

* using lazy_gettext instead fixes that, because it calculates
  the translation at the request level

Co-authored-by: Mirek Simek <[email protected]>

invenio_banners/services/config.py

@@ -7,7 +7,7 @@
 
 """Banners Service configuration."""
 
-from invenio_i18n import gettext as _
+from invenio_i18n import lazy_gettext as _
 from invenio_records_resources.services import Link, RecordServiceConfig
 from invenio_records_resources.services.records.links import pagination_links
 from sqlalchemy import asc, desc