GOV Figma Kit updates for GOV.UK Frontend v5.7.0

[Whersi]

What

Following the review of the GOV.UK Frontend v5.7.0 we are required to update the GOV.UK Figma kit.

Why

So users have the most upto date GOV.UK Figma kit.

Who needs to be involved

• Interaction Designer

Tasks

• Update spacing on GOV.UK Service navigation component: Fix service navigation mobile toggle spacing alphagov/govuk-frontend#5278
• Update spacing on GOV.UK Details component: Only apply margin to details summary when open alphagov/govuk-frontend#5352
• Fill out release notes
• Publish library changes with release notes

[murrlipp]

This is complete. Noting here that no changes were required to the 'Details' component as the spacing was already collapsed.