chore(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] <[email protected]>

.github/workflows/docker-image.yml

@@ -53,7 +53,7 @@ jobs:
 
       - name: Build and push Docker image (v7)
         id: docker_build_7
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./7.7
           push: ${{ github.event_name != 'pull_request' }}
@@ -66,7 +66,7 @@ jobs:
 
       - name: Build and push Docker image (v8)
         id: docker_build_8
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./8.4
           push: ${{ github.event_name != 'pull_request' }}
@@ -81,7 +81,7 @@ jobs:
 
       # - name: Build and push Docker image (alpine)
       #   id: docker_build_alpine
-      #   uses: docker/build-push-action@v5
+      #   uses: docker/build-push-action@v6
       #   with:
       #     context: ./alpine
       #     push: ${{ github.event_name != 'pull_request' }}