Explore wrapping button group items with a div to simplify css selection

[broccolinisoup]

Closes #

Changelog

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• [ ] 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

Testing & Reviewing

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 (Learn more about how to run integration tests)

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: ea8b026fa65577db8c870ea5a6ebed59f55ef0bd

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[github-actions[bot]]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	91.23 KB (-0.03% 🔽)
packages/react/dist/browser.umd.js	91.48 KB (-0.03% 🔽)

[primer-integration[bot]]

:wave: Hi from github/github! Your integration PR is ready: https://github.com/github/github/pull/331337

[broccolinisoup]

closing in favour of https://github.com/primer/react/pull/4723