Bump docker/build-push-action from 5.4.0 to 6.9.0 (#1976)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.4.0 to 6.9.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.4.0...v6.9.0)

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

.github/workflows/deploy.yml

@@ -44,7 +44,7 @@ jobs:
         registry: ghcr.io
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
-    - uses: docker/build-push-action@v5.4.0
+    - uses: docker/build-push-action@v6.9.0
       with:
         context: .
         file: ./full-node/Dockerfile