chore(deps): update docker/build-push-action action to v6

[renovate[bot]]

This PR contains the following updates:

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

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Release Notes

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

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

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.21%. Comparing base (5d16fd6) to head (e4e213a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #166 +/- ## ======================================= Coverage 83.21% 83.21% ======================================= Files 68 68 Lines 9051 9051 ======================================= Hits 7532 7532 Misses 1519 1519 ```

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