feat(github-action)!: Update docker/build-push-action ( v5.4.0 → v6.0.0 )

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
docker/build-push-action	action	major	v5.4.0 -> v6.0.0

---

Release Notes

docker/build-push-action (docker/build-push-action)

### [`v6.0.0`](https://togithub.com/docker/build-push-action/compare/v5.4.0...v6.0.0) [Compare Source](https://togithub.com/docker/build-push-action/compare/v5.4.0...v6.0.0)

---

Configuration

📅 Schedule: 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 has been generated by Mend Renovate. View repository job log here.