Update link on select component page

[sarawilcox]

Feedback that YouTube video we are linking to is no longer available:
Watch a video about how some users struggle with selects: Alice Bartlett: Burn your select tags. on https://service-manual.nhs.uk/design-system/components/select
Please can this be removed or replaced.

[sarawilcox]

We're updating the info on the Select page to say the following in the Research section. Based on GOV with some additional wording.

Research

User research shows that some users struggle with the select component, especially people who use a keyboard to navigate and people with motor difficulties. The dropdown feature makes users work hard to see and understand their options and click the option they want.

Known issues and gaps

Research shows that users can struggle with selects, particularly when users have:

• been unable to close the select
• tried to type into the select
• confused focused items with selected items
• tried to pinch zoom select options on smaller devices
• not understood that they can scroll down to see more items, or how to

This is in branch https://github.com/nhsuk/nhsuk-service-manual/tree/mixed-bug-fixes-for-feb-releases for publication in an upcoming release.