fix: reinstate left border for quotes

[laurelfulford]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

As of upgrading to WordPress 7.0, some Newspack sites have lost the left border on the Quote block on the front-end. The border style and width, plus left padding are normally added inline. They still work in the editor.

I can't recreate this locally but can see it on live sites and confirmed the missing styles are contributing.

This PR adds the style (solid) and left padding to the theme directly to avoid issues where this is missing.

How to test the changes in this Pull Request:

I haven't been able to recreate this, but:

1. Apply the PR and build.
2. Add two Quote blocks, one with the default style and one with the plain style. Publish.
3. Confirm the Quote block with the default style has a 2px border on the left in the editor and the front-end, and the one with the plain style does not.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[Copilot]

Pull request overview

This PR updates the theme’s front-end Quote block styling to ensure the default Quote variant reliably renders with a left border after WordPress 7.0, even when expected inline styles are missing.

Changes:

• Adjusts the .wp-block-quote rule for non-large/non-plain quotes to explicitly set a left border.
• Refines the conditional selector for which quote styles should receive the border.

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[laurelfulford]

This is a two-line CSS fix, so merging without review.

[github-actions]

Hey @laurelfulford, good job getting this PR merged! 🎉

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[github-actions]

🎉 This PR is included in version 2.22.1 🎉

The release is available on GitHub release

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