build(deps): bump docker/build-push-action from 5 to 6 (#21)

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

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build Dockerfile
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./devcontainer
           load: true
@@ -40,7 +40,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build Dockerfile
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./autoconf
           build-args: AUTOCONF_VERSION=${{ matrix.autoconf_version }}

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./${{ inputs.package }}
           platforms: linux/amd64,linux/arm64