Bump @primer/primitives from 7.12.0 to 7.15.0 (#2541)

Bumps [@primer/primitives](https://github.com/primer/primitives) from 7.12.0 to 7.15.0.
- [Release notes](https://github.com/primer/primitives/releases)
- [Changelog](https://github.com/primer/primitives/blob/main/CHANGELOG.md)
- [Commits](primer/primitives@v7.12.0...v7.15.0)

---
updated-dependencies:
- dependency-name: "@primer/primitives"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]