Bump buildpacks/github-actions from 5.8.3 to 5.8.7 (#258)

Bumps [buildpacks/github-actions](https://github.com/buildpacks/github-actions) from 5.8.3 to 5.8.7.
- [Release notes](https://github.com/buildpacks/github-actions/releases)
- [Commits](buildpacks/github-actions@v5.8.3...v5.8.7)

---
updated-dependencies:
- dependency-name: buildpacks/github-actions
  dependency-type: direct:production
  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>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
       - name: Rust Cache
         uses: Swatinem/[email protected]
       - name: Install Pack CLI
-        uses: buildpacks/github-actions/[email protected].3
+        uses: buildpacks/github-actions/[email protected].7
       - name: Run integration tests
         # Runs only tests annotated with the `ignore` attribute (which in this repo, are the integration tests).
         run: cargo test --locked -- --ignored