Bump @primer/primitives from 7.15.8 to 7.15.9 (#144)

Bumps [@primer/primitives](https://github.com/primer/primitives) from 7.15.8 to 7.15.9.
- [Release notes](https://github.com/primer/primitives/releases)
- [Changelog](https://github.com/primer/primitives/blob/main/CHANGELOG.md)
- [Commits](primer/primitives@v7.15.8...v7.15.9)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Siddharth Kshetrapal <[email protected]>

Author: dependabot[bot]