override JNews Primary Cat with Yoast Primary Cat

add_filter( 'jnews_primary_category', 'override_jnews_primary_cat_with_yoast', 99, 2 );

function override_jnews_primary_cat_with_yoast( $cat_id, $post_id ) {
    $yoast_primary_cat = yoast_get_primary_term_id( 'category', $post_id );
    return $yoast_primary_cat ? $yoast_primary_cat : $cat_id;
}