Bump buildpacks/github-actions from 5.8.11 to 5.9.1

Bumps [buildpacks/github-actions](https://github.com/buildpacks/github-actions) from 5.8.11 to 5.9.1.
- [Release notes](https://github.com/buildpacks/github-actions/releases)
- [Commits](buildpacks/github-actions@v5.8.11...v5.9.1)

---
updated-dependencies:
- dependency-name: buildpacks/github-actions
  dependency-version: 5.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -72,7 +72,7 @@ jobs:
       - id: checkout
         uses: actions/checkout@v4
       - id: setup-pack
-        uses: buildpacks/github-actions/setup-pack@v5.8.11
+        uses: buildpacks/github-actions/setup-pack@v5.9.1
       - name: Log in to the Container registry
         uses: docker/login-action@v3
         with: