ci(deps): Bump docker/build-push-action from 6.9.0 to 7.0.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.9.0 to 7.0.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@4f58ea7...d08e5c3)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/docker-e2e.yml

@@ -35,7 +35,7 @@ jobs:
 
       # ── 3. Build image (no push) ─────────────────────────────────────
       - name: Build Dockerfile.complete
-        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75  # v6.9.0
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294  # v7.0.0
         with:
           context: .
           file: ./Dockerfile.complete

.github/workflows/publish-container.yml

@@ -60,7 +60,7 @@ jobs:
       
       - name: Build and push multi-platform image
         id: build-push
-        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75  # v6.9.0
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294  # v7.0.0
         with:
           context: .
           platforms: linux/amd64,linux/arm64