Replace "Howdy" Greeting in Admin Bar

<?php
add_filter( 'admin_bar_menu', 'scseed_replace_howdy_greeting', 25 );
function scseed_replace_howdy_greeting( WP_Admin_Bar $wp_admin_bar ) {
    $my_account = $wp_admin_bar->get_node( 'my-account' );
    if ( ! $my_account ) {
        return;
    }
    $title = str_replace( 'Howdy,', 'Hello,', $my_account->title );
    $wp_admin_bar->add_node( array(
        'id'    => 'my-account',
        'title' => $title,
    ) );
}