Dynamically Display Current Year in Post Title

Hi there,

I’ve tried this code to no avail:

//* Shortcode to display the current year in WordPress
//* shortcode: [year]
add_shortcode( 'year' , 'current_year' );
    function current_year() {
    $year = date("Y");
    return "$year";
}

//* Activate shortcode function in Post Title
add_filter( 'the_title', 'do_shortcode' );

I’m thinking it might in conflict with another custom code to display the title in a page hero:

function my_custom_page_hero() {
    // Check if it's not the homepage
if (!is_front_page()) {
    // Output page or post title and post meta
    add_action('generate_after_header', function() {
        ?>
        <div class="page-hero">
            <div class="container">
                <h1><?php
                    if (is_category()) {
                        single_cat_title();
                    } elseif (is_author()) {
                        the_author();
                    } else {
                        echo get_the_title();
                    }
                ?></h1>

Is there a way to fix this?