Bump govuk_publishing_components from 11.2.0 to 12.1.0

[dependabot-preview]

Bumps govuk_publishing_components from 11.2.0 to 12.1.0.

Changelog

Sourced from govuk_publishing_components's changelog.

12.1.0

• Add option to send the user_organisation in admin analytics component (PR #577)
• Add a bottom margin to the error-alert component (PR #578)
• Update the way we include Javascript and Stylesheets in the admin layout
  component. Make sure to follow the installation instructions (PR #571) if your using the admin layout component.
• Fix background colour for focused buttons (PR #579)

12.0.1

• Add a bottom margin to the success-alert component (PR #573)

12.0.0

• Append the product name to the browser title (PR #563)
• BREAKING: Remove Slimmer as a dependency
  This comprises many minor changes to components so they no longer rely on
  Static provided stylesheets.

• If your app uses Slimmer, the component guide will no longer use it and you
  can no longer rely on any resets/global rules provided
• If your app removes the Slimmer middleware this will now break as Slimmer
  will be an undefined constant
• Apps which the admin layout no longer need to include jQuery as this comes
  bundled in the admin scripts.

• Use a purple environment colour on Heroku (#566). Make sure to add a HEROKU environment variable to Heroku instances.
• Use a red favicon colour on production (#566)

Commits

• dbc50b2 Merge pull request #580 from alphagov/v-12.1.0
• d2935d2 Release 12.1.0
• 6c9fbf5 Merge pull request #581 from alphagov/add-lists
• ebbe103 Add lists & section break to admin layout
• c9ecc91 Merge pull request #579 from alphagov/fix-focus-colour-for-buttons
• ac8bba6 Display examples as button elements instead of anchors
• 0886dad Fix background colour issue for focused buttons
• 61dd75e Merge pull request #577 from alphagov/add-current-user-organisation
• 2ad00cd Send the current user's organisation to GA
• 9e0c95d Merge pull request #576 from alphagov/fix-grid-system
• Additional commits viewable in compare view

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