Bump docker/build-push-action from 3.2.0 to 6.12.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3.2.0 to 6.12.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3.2.0...v6.12.0)

---
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]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -200,7 +200,7 @@ jobs:
         run: echo ::set-output "name=tag::$(echo ${{ matrix.platform }} | tr / -)"
 
       - name: Build
-        uses: docker/build-push-action@v3.2.0
+        uses: docker/build-push-action@v6.12.0
         with:
           push: false
           load: true