fix(button): adjust static primary outline button border colors

[rise-erpelding]

Description

Adjusts static black outline button border color (primary/non-secondary variant) to transparent-black-800 and static white outline button border color (primary/non-secondary variant) to transparent-white-800 for S2 theme. This aligns the border color with the S2 spec.

SWC-496

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. Check out the branch locally or use the preview to open the storybook testing preview page for button
2. Check S2's static white variant to confirm that non-secondary outline button's border color matches the design spec
   • Confirm that border color is transparent-white-800 (opacity is 0.84, previous opacity was 0.44)
3. Check S2's static white variant to confirm that non-secondary outline button's border color matches the design spec
   • Confirm that border color is transparent-black-800 (opacity is 0.85, previous opacity was 0.94)
4. Check other test cases within S2 theme
   • Confirm that there are no unexpected regressions to other variants
5. Check S1/Express themes
   • Confirm there are no unexpected regressions to other themes

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.

8. 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

S2 Static white before:

S2 Static white after (decreased opacity):

S2Static black before:

S2 Static black after (increased opacity):

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: 29b2d09

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/button	Patch

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[github-actions]

File metrics

Summary

Total size: 2.25 MB^*

Package	Size	Minified	Gzipped
button	38.55 KB	36.64 KB	4.21 KB

button

Filename	Head	Minified	Gzipped	Compared to base
index-base.css	31.05 KB	29.48 KB	3.80 KB	-
index-theme.css	12.40 KB	12.01 KB	1.14 KB	-
index.css	38.55 KB	36.64 KB	4.21 KB	-
metadata.json	19.96 KB	-	-	🔴 ⬆ 0.08 KB
themes/express.css	9.68 KB	9.38 KB	1.06 KB	-
themes/spectrum-two.css	9.44 KB	9.15 KB	1.07 KB	-
themes/spectrum.css	9.76 KB	9.46 KB	1.08 KB	-

* Size is the sum of all main files for packages in the library.
* An ASCII character in UTF-8 is 8 bits or 1 byte.

[github-actions]

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