Bump stumpylog/image-cleaner-action from 0.6.0 to 0.7.0 (nginx#215)

Bumps [stumpylog/image-cleaner-action](https://github.com/stumpylog/image-cleaner-action) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/stumpylog/image-cleaner-action/releases)
- [Changelog](https://github.com/stumpylog/image-cleaner-action/blob/main/CHANGELOG.md)
- [Commits](stumpylog/image-cleaner-action@0c9e57e...f39c67c)

---
updated-dependencies:
- dependency-name: stumpylog/image-cleaner-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/image-cleanup.yml

@@ -28,7 +28,7 @@ jobs:
           .github/workflows/scripts/delete-untagged-amazon-public-ecr-images.sh
 
       - name: Delete untagged NGINX Unprivileged Docker images on the GitHub Container Registry
-        uses: stumpylog/image-cleaner-action/untagged@0c9e57eef74b24c7b41f98f73dcb404eb58b2fab # v0.6.0
+        uses: stumpylog/image-cleaner-action/untagged@f39c67c8ba6953b856f32dca2b5be0567497fa67 # v0.7.0
         with:
           is_org: true
           owner: nginxinc