[Darkside] 💫 Updated ExpansionCard animation

[KenAJoh]

Description

Adds animation for "closing"-state

Got multiple thumbs up on this version in Figma, so guessing we are trying this variant for now 🚀

Component Checklist 📝

• [ ] JSDoc
• [ ] Examples
• [ ] Documentation / Decision Records
• [ ] Storybook
• [ ] Style mappings (@navikt/core/css/config/_mappings.js)
• [ ] Component tokens (@navikt/core/css/tokens.json)
• [ ] CSS class deprecations (@navikt/aksel-stylelint/src/deprecations.ts)
• [ ] Exports (@navikt/core/react/src/index.ts and @navikt/core/react/package.json)
• [ ] New component? CSS import (@navikt/core/css/index.css)
• [ ] Breaking change? Update migration guide. Consider codemod.
• [ ] Changeset (Format: <Component>: <gitmoji?> <Text>. E.g. "Button: :sparkles: Add feature xyz.")

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: bfa62c66ecba26f5b7f7d8903757dfd2ea520bde

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions[bot]]

Storybook demo

e19dff46d | 91 komponenter | 138 stories