Retire WCAG tags and guidance on rebrand pages

[calvin-lau-sig7]

What

Review all WCAG 2.2 callouts throughout the Design System website and remove those that are needed for the rebrand MVP. Changes in this cycle are added to alphagov/govuk-frontend#4547.

Content edits to retiring WCAG 2.2 highlighting
Sandbox for testing callout changes

Why

WCAG 2.2 guidance is due to be retired. We can use this time to explore how to do this in a way that compliments the branding work.

Who needs to be involved

Content designer, interaction designer

Who needs to review

Content designer, accessibility specialist

Done when

• MVP done, WCAG tags removed in affected component pages in Bump the lint group with 6 updates govuk-frontend#4547
• WCAG retirement branch is created Bump marked-linkify-it from 3.1.6 to 3.1.8 govuk-frontend#4550
• pages with WCAG 2.2 callouts assessed
• content designer and accessibility specialist have made decisions made for all WCAG 2.2-affected pages
• guidance edits drafted in working doc, where needed
• guidance edits added to pull request Bump marked-linkify-it from 3.1.6 to 3.1.8 govuk-frontend#4550
• overall feedback from accessibility specialist is obtained
• revisit template and "generify" it to be used for all types of callouts

[calvin-lau-sig7]

This is on hold 'til later on this cycle.

We've already taken an MVP approach and implements decided actions into the content prototype alphagov/govuk-frontend#4547.