⬆️ Bump docker/build-push-action from 5.3.0 to 6.9.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.3.0 to 6.9.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.3.0...v6.9.0)

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

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

.github/workflows/test_cpac.yaml

@@ -36,7 +36,7 @@ jobs:
       with:
         fetch-depth: 0
     - name: Build and push
-      uses: docker/build-push-action@v5.3.0
+      uses: docker/build-push-action@v6.9.0
       with:
         context: .
         file: ./.github/Dockerfiles/c-pac_api.${{ matrix.tag }}.Dockerfile