fix(avatar): remove outline and reduce redundancy

[cdransf]

Description

• Updates the avatar link styles to reduce redundancy and properly remove the border that was displayed in high contrast mode.

How and where has this been tested?

• Verified in assistiv labs Windows High Contrast Mode

Validation steps

1. Run Storybook locally (or reference the link for this PR).
2. Navigate to Assistiv Labs and start a Windows High Contrast Mode VM (if running the branch locally, you'll need to enable the Assistiv Labs tunnel to access Storybook).
3. Enable Windows High Contrast Mode.
4. Navigate to the Avatar component in Storybook.
5. Verify that the square yellow outline no longer renders around the avatar component.

Regression testing

Validate:

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

• The pages render correctly, are accessible, and are responsive.

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

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

Screenshots

To-do list

• I have read the contribution guidelines.
• 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]

🦋 Changeset detected

Latest commit: 2eb6acd

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/avatar	Minor

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[github-actions]

🚀 Deployed on https://pr-3105--spectrum-css.netlify.app

[github-actions]

File metrics

Summary

Total size: 4.10 MB^*
Total change (Δ): ⬇ 0.17 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
avatar	4.99 KB	⬇ 0.06 KB

Details

avatar

File	Head	Base	Δ
index-base.css	4.99 KB	5.04 KB	⬇ 0.06 KB (-1.07%)
index-vars.css	4.99 KB	5.04 KB	⬇ 0.06 KB (-1.07%)
index.css	4.99 KB	5.04 KB	⬇ 0.06 KB (-1.07%)

* 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.

[rise-erpelding]

LGTM! What a huge improvement from what it looked like before in WHCM, oof.