CI(deps): Bump docker/build-push-action from 5 to 6

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>

.github/workflows/build-push.yml

@@ -73,7 +73,7 @@ jobs:
  echo "GIT_SHA_SHORT=${GITHUB_SHA::${{ env.GITHUB_SHA_LEN }}}" >> $GITHUB_ENV
 
  - name: Build container and export it to local Docker
- uses: docker/build-push-action@v5
+ uses: docker/build-push-action@v6
  with:
  load: true
  tags: local/${{ matrix.container_flavor }}
@@ -128,7 +128,7 @@ jobs:
  password: ${{ secrets.GITHUB_TOKEN }}
 
  - name: Build container again and push it
- uses: docker/build-push-action@v5
+ uses: docker/build-push-action@v6
  with:
  push: true
  tags: ${{ steps.meta.outputs.tags }}