Bump docker/build-push-action from 5.3.0 to 5.4.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.3.0...v5.4.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/push.yml

@@ -105,7 +105,7 @@ jobs:
         echo "__gitsha__ = '${GITHUB_SHA::7}'" >> oaatoperator/__init__.py
         echo "__build_date__ = '$(date +%Y%m%d%H%M%S)'" >> oaatoperator/__init__.py
     - name: Build the Docker image (with :<sha> and :dev tags)
-      uses: docker/build-push-action@v5.3.0
+      uses: docker/build-push-action@v5.4.0
       with:
         context: .
         file: build/Dockerfile