Merge pull request #20395 from zshihang/master

finish TODO in upgrade test config

config/jobs/kubernetes/sig-auth/serviceaccount-admission-controller-migration-config.yaml

@@ -3,15 +3,13 @@ periodics:
   annotations:
     testgrid-dashboards: sig-auth-gce
     testgrid-tab-name: upgrade-tests
-    # TODO: use sig-auth mailing list
-    testgrid-alert-email: zshihang@google.com
+    testgrid-alert-email: kubernetes-sig-auth+testgrid@googlegroups.com
     testgrid-num-failures-to-alert: "3"
   labels:
     preset-service-account: "true"
     preset-k8s-ssh: "true"
   decorate: true
-  # TODO: lower to once a day
-  interval: 2h
+  interval: 24h
   spec:
     containers:
       - image: gcr.io/k8s-testimages/kubekins-e2e:v20210223-952586a143-master
@@ -24,9 +22,8 @@ periodics:
         - --test=false
         - --check-leaked-resources
         - --check-version-skew=false
-        # TODO: change to release/stable-x.y
         - --extract=ci/latest
-        - --extract=ci/latest-1.19
+        - --extract=ci/latest-1.20
         - --gcp-node-image=gci
         - --gcp-zone=us-west1-b
         - --provider=gce