build(deps): bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...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/ci.yaml

@@ -82,7 +82,7 @@ jobs:
             echo "No new version"
             echo "release-version=latest" >> "$GITHUB_OUTPUT"
           fi
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         with:
           build-args: GITHUB_TOKEN=${{ secrets.GHA_TOKEN }}
           cache-from: type=gha