Bump r-lib/actions from 2.8.7 to 2.9.0 (#127)

Bumps [r-lib/actions](https://github.com/r-lib/actions) from 2.8.7 to 2.9.0.
- [Release notes](https://github.com/r-lib/actions/releases)
- [Changelog](https://github.com/r-lib/actions/blob/v2-branch/NEWS.md)
- [Commits](r-lib/actions@b7e68d6...929c772)

---
updated-dependencies:
- dependency-name: r-lib/actions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/CI.yml

@@ -73,7 +73,7 @@ jobs:
           version: ${{ matrix.version }}
       - uses: julia-actions/cache@d48542bb7b6239a9391789f01d21a6bdde9ad5df
 
-      - uses: r-lib/actions/setup-r@b7e68d63e51bdf225997973e2add36d551f60f02
+      - uses: r-lib/actions/setup-r@929c772977a3a13c8733b363bf5a2f685c25dd91
         with:
           use-public-rspm: true
           r-version: "4.3"