Use template-list-item selector

For consistency with other assertions

tests/app/main/views/test_template_folders.py

@@ -533,7 +533,7 @@ def test_template_id_is_searchable_for_services_with_api_keys(
         normalize_spaces(item.text)
         for item in page.select(
             # Text which should be hidden from all users
-            r'#template-list .govuk-\!-display-none'
+            r'.template-list-item .govuk-\!-display-none'
         )
     ] == [
         template_2["id"],