chore(deps): bump docker/build-push-action from 5 to 6 (#8)

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
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -91,7 +91,7 @@ jobs:
           echo "short-sha=$(echo ${{ github.sha }} | cut -c 1-7 )" >> $GITHUB_OUTPUT
       - if: github.ref == 'refs/heads/main'
         name: Build and push Docker image - main
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           labels: ${{ steps.meta.outputs.labels }}
@@ -105,7 +105,7 @@ jobs:
             ${{ env.DOCKER_REPOSITORY }}:latest
       - if: github.event_name == 'pull_request'
         name: Build and push Docker image - pull request
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           labels: ${{ steps.meta.outputs.labels }}
@@ -196,7 +196,7 @@ jobs:
         run: |
           echo "short-sha=$(echo ${{ github.sha }} | cut -c 1-7 )" >> $GITHUB_OUTPUT
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           labels: ${{ steps.meta.outputs.labels }}