kube-metrics-adapter: Update to version v0.2.4-3-g21dae23

Update container-registry.zalando.net/teapot/kube-metrics-adapter to version v0.2.4-3-g21dae23

Author: k8s-on-aws-manager-app[bot]

cluster/manifests/kube-metrics-adapter/deployment.yaml

@@ -27,7 +27,7 @@ spec:
       serviceAccountName: custom-metrics-apiserver
       containers:
       - name: kube-metrics-adapter
-        image: container-registry.zalando.net/teapot/kube-metrics-adapter:v0.2.4-2-g7d47ff5
+        image: container-registry.zalando.net/teapot/kube-metrics-adapter:v0.2.4-3-g21dae23
         env:
         - name: AWS_REGION
           value: {{ .Cluster.Region }}