Bump docker/build-push-action from 6.5.0 to 6.6.1 (#133)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.5.0 to 6.6.1.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@5176d81...16ebe77)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Diff for: .github/workflows/smoketest.yml

@@ -16,7 +16,7 @@ jobs:
           install: true
 
       - name: Build Docker image and store in cache
-        uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445
+        uses: docker/build-push-action@16ebe778df0e7752d2cfcbd924afdbbd89c1a755
         env:
           DOCKER_BUILD_NO_SUMMARY: true
         with: