chore(deps): bump docker/build-push-action from 5 to 6 (#223)

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>

Author: dependabot[bot]

.github/workflows/ci-docker.yml

@@ -21,7 +21,7 @@ jobs:
         with:
           images: ${{ env.GHCR_IMAGE_NAME }}
       - name: build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: false

.github/workflows/publish.yml

@@ -102,7 +102,7 @@ jobs:
             # semver
             type=semver,pattern={{version}}
       - name: Build images
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           outputs: "type=registry,push=true"
           platforms: linux/amd64,linux/arm64