I have my code to register my custom taxonomies.

    function themename_custom_taxonomies() {
    	// Coaching Method
    
    	$coach_method = array(
    		'name' => _x( 'Nieruchomość', 'taxonomy general name' ),
    		'singular_name' => _x( 'Nieruchomość', 'taxonomy singular name' ),
    		'search_items' =>  __( 'Szukaj nieruchomości' ),
    		'all_items' => __( 'Wszystkie nieruchomości' ),
    		'most_used_items' => null,
    		'parent_item' => null,
    		'parent_item_colon' => null,
    		'edit_item' => __( 'Edytuj' ), 
    		'update_item' => __( 'Zapisz' ),
    		'add_new_item' => __( 'Dodaj nieruchomość' ),
    		'new_item_name' => __( 'Nowa nieruchomość' ),
    		'menu_name' => __( 'Nieruchomości' ),
    	);
    	$args = array(
    		'hierarchical' => true,
    		'labels' => $coach_method,
    		'show_ui' => true,
    		'query_var' => true,
    		'rewrite' => array('slug' => 'listings/?_prop=', 'with_front' => false)
    	);
        register_taxonomy( 'nieruchomosc', array( 'nieruchomosc', 'ogloszenia' ), $args );
    }

At this moment my taxonomy permalinks look:

    https://example.com/listings/?_prop=/term-slug/

How can I change it for (without the slashes):

    https://example.com/listings/?_prop=term-slug

Thank you in advance for help.