chore(deps): update docker/build-push-action action to v7

[plengauer]

This PR contains the following updates:

Package	Type	Update	Change
docker/build-push-action	action	major	v6.19.2 → v7.0.0

---

Release Notes

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

v7.0.0

Compare Source

• Node 24 as default runtime (requires Actions Runner v2.327.1 or later) by @​crazy-max in #​1470
• Remove deprecated DOCKER_BUILD_NO_SUMMARY and DOCKER_BUILD_EXPORT_RETENTION_DAYS envs by @​crazy-max in #​1473
• Remove legacy export-build tool support for build summary by @​crazy-max in #​1474
• Switch to ESM and update config/test wiring by @​crazy-max in #​1466
• Bump @​actions/core from 1.11.1 to 3.0.0 in #​1454
• Bump @​docker/actions-toolkit from 0.62.1 to 0.79.0 in #​1453 #​1472 #​1479
• Bump minimatch from 3.1.2 to 3.1.5 in #​1463

Full Changelog: docker/build-push-action@v6.19.2...v7.0.0

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, 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 Renovate Bot.

[Copilot]

Pull request overview

Updates the GitHub Actions workflow to use docker/build-push-action v7 to keep CI aligned with the latest upstream changes.

Changes:

• Bump docker/build-push-action from v6.19.2 to v7.0.0 in the test workflow.