Bump docker/build-push-action from 5 to 6 (#1275)

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.yml

@@ -61,7 +61,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}
 
       - name: Docker Build and Push (Ubuntu & NVM variant)
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           platforms: linux/amd64
           target: final-ubuntu
@@ -74,7 +74,7 @@ jobs:
           cache-to: type=gha,mode=max
 
       - name: Docker Build and Push (Distroless variant)
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         if: ${{ env.WORKFLOW_BUILD_DISTROLESS == true }}
         with:
           platforms: linux/amd64