fix: resolve prettier formatting violation in ButtonBase.tsx

[Copilot]

Lint CI was failing due to a prettier formatting violation in ButtonBase.tsx. A nested ternary assigned to className was formatted across multiple lines, which prettier requires on a single line.

Changelog

New

Changed

• Collapsed multi-line ternary in ButtonBase.tsx className prop to single line to satisfy prettier

Removed

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Formatting-only change, no functional impact.

Testing & Reviewing

CI lint job should pass after this change. No functional changes.

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github-ui (Learn more about how to run integration tests)

Original prompt

Fix the failing GitHub Actions workflow lint
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 68182200650
Job URL: https://github.com/primer/react/actions/runs/23438353317/job/68182200650

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 9abe0cc

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[github-actions]

⚠️ Action required

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.