feat(deps): bump docker/build-push-action from 5 to 6 (#44)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker-image-nightly.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Build and push Docker image (Nightly)
         id: docker_build_nightly
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./nightly
           push: ${{ github.event_name != 'pull_request' }}

.github/workflows/docker-image.yml

@@ -61,7 +61,7 @@ jobs:
 
       - name: Build and push Docker image (v9)
         id: docker_build_9
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./9
           push: ${{ github.event_name != 'pull_request' }}
@@ -74,7 +74,7 @@ jobs:
 
       - name: Build and push Docker image (v10)
         id: docker_build_10
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./10
           push: ${{ github.event_name != 'pull_request' }}
@@ -90,7 +90,7 @@ jobs:
 
       - name: Build and push Docker image (v11)
         id: docker_build_11
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./11
           push: ${{ github.event_name != 'pull_request' }}
@@ -108,7 +108,7 @@ 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' }}