Filtering order_comments Field?

Hello! I’m trying to filter the “order_comments” field to add a max length, however, with this plugin active it doesn’t seem to want to work for me.

Here’s the function I am using:

add_filter( 'woocommerce_order_fields', 'limit_checkout_fields', 2000 );

function limit_checkout_fields( $fields ) {
	$fields['order']['order_comments']['maxlength'] = 115;
	return $fields;
}

Is there something I am doing wrong here?