Update filled tag and progress bar colors

[homing1]

Link: preview

This PR updates the secondary-background-glow-high-contrast theme variable to a slightly darker grey as the previous color is deemed too light by users. It also fixes interactive filled tag close hover divider color.

Figma: https://www.figma.com/design/uVA2amRR71yJZ0GS6RI6zL/%F0%9F%8C%9E-Atlas-Design-Library?node-id=73202-812&p=f&t=Fdfh5RYdQKonWpEA-0

Testing

1. Visit http://localhost:1111/components/tag.html , review filled tag background color. Compare with https://design.learn.microsoft.com/components/tag.html .
2. Visit http://localhost:1111/components/progress-bar.html , review progress bar background color. Compare with https://design.learn.microsoft.com/components/progress-bar.html

Expected result: Filled tag and progress bar background color is slightly darker than before.

Additional information

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[changeset-bot]

🦋 Changeset detected

Latest commit: e7c8a5f

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

This PR includes changesets to release 1 package

Name	Type
@microsoft/atlas-css	Minor

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