Remove useage of $(...).once, as it is removed in drupal 10

I have uploaded the patch. Please review.

The patch was successfully applied without any conflicts, but it does not seem to be solving the problem. The console still shows the same error.

Replaced all instances of jQuery.once with core/once.

Is this a dupe of 🐛 Uncaught TypeError: $(...).once is not a function with Drupal 10 RTBC ?

yes, it is a dupe of https://www.drupal.org/project/simple_popup_blocks/issues/3350919 🐛 Uncaught TypeError: $(...).once is not a function with Drupal 10 RTBC .