Change logs:
- Fix the architecture metadata in the multi-arch imagee: #94
Images:
- k8s.gcr.io/cpa/cluster-proportional-autoscaler:1.8.3
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-amd64:1.8.3
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-arm:1.8.3
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-arm64:1.8.3
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-ppc64le:1.8.3