GYE-2403: Update library to service design guidelines for language to…

[rashadmughal]

…ggle.

[rashadmughal]

To ensure the language toggle follows the design guidelines here:

https://design.tax.service.gov.uk/hmrc-design-patterns/welsh-language-toggle/

This what the final output looks like:

Final HTML for when English is selected.

<nav class="language-toggle hmrc-language-select" aria-label="Language switcher">
    <ul class="hmrc-language-select__list language-toggle" style="display: block;">
    
        
            <li class="hmrc-language-select__list-item" style="display: inline-block;">
                <span aria-current="true">English</span>
            </li>
        
        
             | 
        
    
        
            <li class="hmrc-language-select__list-item" style="display: inline-block;">
                <a id="cymraeg-switch" href="/customs/register-for-cds/language/cymraeg" target="_self" data-sso="false" data-journey-click="customs-rosm-frontend:language: cy">
                    <span class="visually-hidden">Newid yr iaith ir Gymraeg</span>
                    <span aria-hidden="true">Cymraeg</span>
                </a>
            </li>
        
        
    
    </ul>
</nav>

And for when welsh is selected:

<nav class="language-toggle hmrc-language-select" aria-label="Language switcher">
    <ul class="hmrc-language-select__list language-toggle" style="display: block;">
    
        
            <li class="hmrc-language-select__list-item" style="display: inline-block;">
                <a id="english-switch" href="/customs/register-for-cds/language/english" target="_self" data-sso="false" data-journey-click="customs-rosm-frontend:language: en">
                    <span class="visually-hidden">Change language to English</span>
                    <span aria-hidden="true">English</span>
                </a>
            </li>
        
        
             | 
        
    
        
            <li class="hmrc-language-select__list-item" style="display: inline-block;">
                <span aria-current="true">Cymraeg</span>
            </li>
        
        
    
    </ul>
</nav>