Add release v1.15 to metadata.yaml#4821

k8s-ci-robot merged 1 commit intokubernetes-sigs:mainkubernetes-sigs/cluster-api-provider-azure:mainfrom

willie-yao:add-1.15-metadatawillie-yao/cluster-api-provider-azure:add-1.15-metadataCopy head branch name to clipboard