Update docker/build-push-action action to v6.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
docker/build-push-action	action	minor	v6.8.0 -> v6.9.0

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Release Notes

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

### [`v6.9.0`](https://redirect.github.com/docker/build-push-action/releases/tag/v6.9.0) [Compare Source](https://redirect.github.com/docker/build-push-action/compare/v6.8.0...v6.9.0) - Bump [@​docker/actions-toolkit](https://redirect.github.com/docker/actions-toolkit) from 0.38.0 to 0.39.0 in [https://github.com/docker/build-push-action/pull/1234](https://redirect.github.com/docker/build-push-action/pull/1234) - Bump path-to-regexp from 6.2.2 to 6.3.0 in [https://github.com/docker/build-push-action/pull/1232](https://redirect.github.com/docker/build-push-action/pull/1232) **Full Changelog**: https://github.com/docker/build-push-action/compare/v6.8.0...v6.9.0

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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.

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

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