fix(ci):Disable linux/s390x Docker builds (#887)

Author: Suyunmeng

.github/workflows/test_docker.yml

@@ -20,7 +20,7 @@ env:
   IMAGE_NAME_DOCKERHUB: openlist
   REGISTRY: ghcr.io
   ARTIFACT_NAME: 'binaries_docker_release'
-  RELEASE_PLATFORMS: 'linux/amd64,linux/arm64,linux/arm/v7,linux/386,linux/arm/v6,linux/s390x,linux/ppc64le,linux/riscv64'
+  RELEASE_PLATFORMS: 'linux/amd64,linux/arm64,linux/arm/v7,linux/386,linux/arm/v6,linux/ppc64le,linux/riscv64' ### Temporarily disable Docker builds for linux/s390x architectures for unknown reasons.
   IMAGE_PUSH: ${{ github.event_name == 'push' }}
   IMAGE_TAGS_BETA: |
     type=ref,event=pr