Update attachment link accessibility guidance

app/views/govuk_publishing_components/components/docs/attachment_link.yml

@@ -6,6 +6,12 @@ body: |
 
  It is expected to be embedded inside an element that provides text styles
  (such as `.govuk-body`) so does not provide its own text styling.
+accessibility_criteria: |
+ All touch targets must be 24px large, or leave sufficient space (target-size). See [Understanding Success Criterion 2.5.8: Target Size (Minimum))](https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html)
+
+ To achieve this, you can embed the link within another element that maintains sufficient distance between links. For instance, you can place individual links inside a paragraph element styled with a `.govuk-body` class, or as list items in the [list component](https://components.publishing.service.gov.uk/component-guide/list).
+
+ Links within paragraphs of text do not need to meet the 24 by 24 CSS pixels requirements, so the Success Criterion passes.
 shared_accessibility_criteria:
 - link
 examples: