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] <support@github.com>

.github/workflows/reusable_dockerfile_pipeline.yml

@@ -150,7 +150,7 @@ jobs:
         uses: "actions/checkout@v4"
 
       - name: Build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         env:
           OUTPUT_SHORT_SHA: ${{ needs.prepare-env.outputs.output_short_sha }}
           OUTPUT_IMAGE_NAME: ${{ needs.prepare-env.outputs.output_image_name }}
@@ -276,7 +276,7 @@ jobs:
       # longer.
       - name: "Merge on Main Trigger: Build and Push All Docker Images"
         if: ${{ needs.prepare-env.outputs.build_for_merge == 'true' && steps.run_check.outputs.run == 'true'}}
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         env:
           OUTPUT_SHORT_SHA: ${{ needs.prepare-env.outputs.output_short_sha }}
           OUTPUT_IMAGE_NAME: ${{ needs.prepare-env.outputs.output_image_name }}
@@ -296,7 +296,7 @@ jobs:
       # bugs. For testing purposes we only need an amd64 image.
       - name: "Pull Request Trigger: Build and Push amd64 Docker Image"
         if: ${{ needs.prepare-env.outputs.build_for_pr == 'true' && steps.run_check.outputs.run == 'true'}}
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         env:
           OUTPUT_SHORT_SHA: ${{ needs.prepare-env.outputs.output_short_sha }}
           OUTPUT_IMAGE_NAME: ${{ needs.prepare-env.outputs.output_image_name }}