fix(card -> action button): corrects the size and alignment of the card action button

[cdransf]

Description

• [x] adds justify-content: space-between to .spectrum-Card-header
• [x] removes flex: 1 from .spectrum-Card-actionButton

This prevents .spectrum-Card-actionButton from spilling the available space in the header and aligns the title and action button at the opposite edges of the container.

How and where has this been tested?

Please tag yourself on the tests you've marked complete to confirm the tests have been run by someone other than the author.

Validation steps

1. Open the Storybook URL for the PR (or run against the branch locally).
2. Navigate to the card component.
3. Set Card actions to true
4. Hover over the action button to verify the proper card dimensions.

Regression testing

Validate:

1. The documentation pages for at least two other components are still loading, including:

• [x] The pages render correctly, are accessible, and are responsive.

5. If components have been modified, VRTs have been run on this branch:

• [x] VRTs have been run and looked at.
• [x] Any VRT changes have been accepted (by reviewer and/or PR author), or there are no changes.

Screenshots

To-do list

• [x] I have read the contribution guidelines.
• [x] I have updated relevant storybook stories and templates.
• [ ] I have tested these changes in Windows High Contrast mode.
• [ ] If my change impacts other components, I have tested to make sure they don't break.
• [ ] If my change impacts documentation, I have updated the documentation accordingly.
• [ ] ✨ This pull request is ready to merge. ✨

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 16704ffbda82457ca86a8aeb96223d9673478f1a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------------ | ----- | | @spectrum-css/card | Minor |

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[github-actions[bot]]

🚀 Deployed on https://pr-3072--spectrum-css.netlify.app

[github-actions[bot]]

File metrics

Summary

Total size: 4.10 MB^* Total change (Δ): ⬆ 0.07 KB (0.00%)

Table reports on changes to a package's main file. Other changes can be found in the collapsed Details section below.

Package	Size	Δ
card	20.66 KB	⬆ 0.02 KB

Details

#### card | File | Head | Base | Δ | | - | - | - | - | | index-base.css | 20.66 KB | 20.64 KB | ⬆ 0.02 KB (0.11%) | | index-vars.css | 20.66 KB | 20.64 KB | ⬆ 0.02 KB (0.11%) | | **index.css** | 20.66 KB | 20.64 KB | ⬆ 0.02 KB (0.11%) |

• Size determined by adding together the size of the main file for all packages in the library.
  
• Results are not gzipped or minified.
  
• An ASCII character in UTF-8 is 8 bits or 1 byte.