wp-includes widgets validation error

I’m getting a couple of W3C validation errors on my site and I traced them to WP-includes/widgets.php. This only occurs when I use the categories widget with “Show as dropdown” checked. From widgets.php:

<script lang='javascript'><!--
    var dropdown = document.getElementById("cat");
    function onCatChange() {
		if ( dropdown.options[dropdown.selectedIndex].value > 0 ) {
			location.href = "<?php echo get_option('home'); ?>/?cat="+dropdown.options[dropdown.selectedIndex].value;
		}
    }
    dropdown.onchange = onCatChange;
--></script>

W3C says need to change <script lang=’javascript’> to <type=”text/javascript”>. I’ve done that many times with other js errors and it always clears stuff up. But WordPress files are sacred ground for me. I don’t fool with them unless you guys tell me it is safe. I know the folks who worked on the 2.3 version are the best.

Could someone please try a validation of my site and tell me if this is really an error in the wp file or something on my site:
https://www.eyesapart.com/

and the validator is here:
https://validator.w3.org/

Thanks,
Lois