Bump the ci_dependencies group across 1 directory with 2 updates

Bumps the ci_dependencies group with 2 updates in the / directory: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) and [docker/build-push-action](https://github.com/docker/build-push-action).


Updates `docker/setup-buildx-action` from 3.5.0 to 3.6.1
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@aa33708...988b5a0)

Updates `docker/build-push-action` from 6.5.0 to 6.7.0
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@5176d81...5cd11c3)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci_dependencies
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci_dependencies
...

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

.github/workflows/release-50_publish-docker.yml

@@ -298,7 +298,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@aa33708b10e362ff993539393ff100fa93ed6a27 # v3.5.0
+        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
       - name: Cache Docker layers
         uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
@@ -322,7 +322,7 @@ jobs:
 
       - name: Build and push
         id:   docker_build
-        uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445 #  v6.5.0
+        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 #  v6.7.0
         with:
           push: true
           file: docker/dockerfiles/polkadot/polkadot_injected_debian.Dockerfile