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] <support@github.com>

.github/workflows/check-containers.yml

@@ -43,7 +43,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build and push to local registry
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ${{ matrix.image.path }}

.github/workflows/push-container-images.yml

@@ -59,7 +59,7 @@ jobs:
           images: ${{ matrix.image.registry }}/${{ matrix.image.name }}
 
       - name: Build and push image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ${{ matrix.image.path }}