Bump buildpacks/github-actions from 5.8.3 to 5.8.8

Bumps [buildpacks/github-actions](https://github.com/buildpacks/github-actions) from 5.8.3 to 5.8.8.
- [Release notes](https://github.com/buildpacks/github-actions/releases)
- [Commits](buildpacks/github-actions@v5.8.3...v5.8.8)

---
updated-dependencies:
- dependency-name: buildpacks/github-actions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -104,7 +104,7 @@ jobs:
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
       - name: Install Pack CLI
-        uses: buildpacks/github-actions/[email protected].3
+        uses: buildpacks/github-actions/[email protected].8
       # The images are pulled up front to prevent duplicate pulls due to the tests being run concurrently.
       - name: Pull builder image
         run: docker pull ${{ env.INTEGRATION_TEST_BUILDER }}