Add info about links styled as buttons to cookie macros

[EoinShaughnessy]

What

Update cookie banner macro options to explain how users can render a link styled as a button.

Why

This option could help users if:

• their cookie banner needs to work without JavaScript
• they have already accepted or rejected cookies - so, when they press Hide and the page reloads, the banner is hidden

PR with technical details about this change: Enable cookie banner to set link styled as a button

Who needs to know about this

Delivery Manager, Developers, Technical Writer

Done when

• Developer drafts update
• Technical Writer reviews update and actions any further changes
• Technical Writer gets update 2i'd
• Update published

[EoinShaughnessy]

Google Doc with content changes: https://docs.google.com/document/d/1BhH2VGCUkbltc5k9hAjSPBCxG7emdX12xxeNinJwOiU/edit

[vanitabarrett]

Do we also need to update the description for the following option?

govuk-frontend/src/govuk/components/cookie-banner/cookie-banner.yaml

Line 55 in 59c11ee

description: The `href` for a link. If you set `href`, users will see a link instead of a button.

[EoinShaughnessy]

Do we also need to update the description for the following option?

govuk-frontend/src/govuk/components/cookie-banner/cookie-banner.yaml

Line 55 in 59c11ee

description: The `href` for a link. If you set `href`, users will see a link instead of a button.

Great shout! As a replacement for what's currently there, could something like the below work?

The href for a link. Set button and href to render a link styled as a button.

Would we need to say anything about href overriding submit?

[vanitabarrett]

@EoinShaughnessy That sounds good to me. I'm not sure if we'd need to mention submit - it feels like it might be covered in the type description?

[EoinShaughnessy]

@vanitabarrett Ah yes, of course. Cool, I'll raise a PR with these changes. Once I get dev sign-off, I'll send the content changes for 2i.