chore(deps): bump docker/build-push-action from 3 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v6)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build-elasticsearch.yml

@@ -87,7 +87,7 @@ jobs:
             type=ref,event=tag,suffix=-${{ matrix.es-version }}
             type=ref,event=pr,suffix=-${{ matrix.es-version }}
 
-      - uses: docker/build-push-action@v3
+      - uses: docker/build-push-action@v6
         with:
           context: images/elasticsearch
           build-args: |