build(deps): bump docker/build-push-action from 4 to 6 (#10)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 4 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v4...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '6'
  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>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
           type=raw,value=latest,enable={{is_default_branch}}
 
     - name: Build and push
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: true

.github/workflows/release.yml

@@ -48,7 +48,7 @@ jobs:
         run: echo "version=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
 
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true