chore(deps): update docker/build-push-action action to v7 (#59)

This PR contains the following updates:

https://github.com/docker/build-push-action `v6` → `v7`

Author: renovate[bot]

.github/workflows/build_containers.yml

@@ -33,7 +33,7 @@ jobs:
         uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4
 
       - name: Build and push
-        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6
+        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7
         with:
           push: true
           platforms: linux/amd64,linux/arm64