Flushing the slug base has no effect and does not change

I’m trying to change the actor slug base, but when refreshing the permalinks everything remains the same. I am using the following code that I found to achieve it:

function space_change_custom_taxonomy_slug_args( $  taxonomy, $  object_type, $  args ){     if( 'actor' == $  taxonomy ){ // Instead of the "old-slug", add current slug, which you want to change.         remove_action( current_action(), __FUNCTION__ );         $  args['rewrite'] = array( 'slug' => 'star' ); // Instead of the "new-slug", add a new slug name.         register_taxonomy( $  taxonomy, $  object_type, $  args );     } } add_action( 'registered_taxonomy', 'space_change_custom_taxonomy_slug_args', 10, 3 ); 

The theme has the following register taxonomy:

// Now register the non-hierarchical taxonomy like tag     register_taxonomy('actors','post', array(         'hierarchical' => false,         'labels' => $  labels,         'show_ui' => true,         'show_admin_column' => true,         'update_count_callback' => '_update_post_term_count',         'query_var' => true,         'show_in_rest' => true,         'rewrite' => array( 'slug' => 'actor' )     )); 

I do not know what I’m doing wrong. And a doubt that I have. It is better to use this code in functions or use a url rewrite rule from .htaccess?