chore(deps): update cloudoperators/juno digest to 28cdec0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cloudoperators/juno (changelog)	workflow	digest	ad16f84 → 28cdec0

---

Configuration

📅 Schedule: (in timezone Europe/Berlin)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[changeset-bot]

⚠️ No Changeset found

Latest commit: c9116c0

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[Copilot]

Pull request overview

Updates the pinned commit digest for the reusable cloudoperators/juno GitHub Actions workflow used to send Slack notifications, keeping CI/release automation aligned with the latest upstream workflow revision.

Changes:

• Bump cloudoperators/juno/.github/workflows/shared-slack-notification.yaml reference from ad16f84... to 7aea99e... across workflows.
• Apply the update consistently to release success/failure and image build failure notifications.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
.github/workflows/release.yaml	Updates reusable Slack notification workflow digest for release success/failure jobs.
.github/workflows/build-push-supernova-image.yaml	Updates reusable Slack notification workflow digest for Supernova image failure notifications.
.github/workflows/build-push-greenhouse-pr-preview.yaml	Updates reusable Slack notification workflow digest for PR preview cleanup failure notifications.
.github/workflows/build-push-greenhouse-image.yaml	Updates reusable Slack notification workflow digest for Greenhouse image failure notifications.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.