chore(deps): bump buildpacks/github-actions in the gh-actions group

Bumps the gh-actions group with 1 update: [buildpacks/github-actions](https://github.com/buildpacks/github-actions).


Updates `buildpacks/github-actions` from 5.12.5 to 6.0.0
- [Release notes](https://github.com/buildpacks/github-actions/releases)
- [Commits](buildpacks/github-actions@v5.12.5...v6.0.0)

---
updated-dependencies:
- dependency-name: buildpacks/github-actions
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gh-actions
...

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

Author: dependabot[bot]

.github/workflows/build-global-renkulab-images.yml

@@ -59,7 +59,7 @@ jobs:
           tags: |
             type=raw,value=${{ matrix.PLATFORM == 'linux/arm64' && 'arm64' || 'amd64' }}
       - name: Setup pack
-        uses: buildpacks/github-actions/setup-pack@v5.12.5
+        uses: buildpacks/github-actions/setup-pack@v6.0.0
       - name: Build image
         working-directory: ./global-images
         run: |