Fix Breadcrumb on RTL AMP mode

/* Fix Breadcrumb on RTL AMP mode */
function fix_breadcrumb_rtl_amp() {
    ?>
    /* Fix Breadcrumb on RTL AMP mode */
    #breadcrumbs .fa-angle-right:before {
        content: '\f104';
    }
    <?php
}
add_action( 'amp_post_template_css', 'fix_breadcrumb_rtl_amp' );