Depracted API usage for Core Web Vitals

Hi, in the js script output by the language switcher shortcode, there is an API call that is deprecated by Chrome (Lighthouse report) CSSCustomStateDeprecatedSyntax

Here is an updated js code to use instead:

<script type="application/javascript">
    document.addEventListener('DOMContentLoaded', function() {
        var trp_ls_shortcodes = document.querySelectorAll('.trp_language_switcher_shortcode .trp-language-switcher');
        
        if (trp_ls_shortcodes.length > 0) {
            // Get the last language switcher added
            var trp_el = trp_ls_shortcodes[trp_ls_shortcodes.length - 1];
            var trp_shortcode_language_item = trp_el.querySelector('.trp-ls-shortcode-language');

            if (trp_shortcode_language_item) {
                // Get the computed style width to ensure compatibility across different scenarios
                var trp_ls_shortcode_width = trp_shortcode_language_item.offsetWidth + 16;

                // Set the width explicitly for both elements
                trp_shortcode_language_item.style.width = trp_ls_shortcode_width + 'px';
                var currentLanguage = trp_el.querySelector('.trp-ls-shortcode-current-language');
                if (currentLanguage) {
                    currentLanguage.style.width = trp_ls_shortcode_width + 'px';
                }

                // Hide the language item after setting the width
                trp_shortcode_language_item.style.display = 'none';
            }
        }
    });
</script>