Bump docker/build-push-action from 6.7.0 to 6.8.0 (#246)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/5cd11c3a4ced054e52742c5fd54dca954e0edd85...32945a339266b759abcbdc89316275140b0fc960)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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