Merge pull request kubernetes#4722 from benluddy/4222-prr-approval

KEP-4222: Update PRR items on release signoff checklist.

Author: k8s-ci-robot

keps/sig-api-machinery/4222-cbor-serializer/README.md

@@ -150,8 +150,8 @@ Items marked with (R) are required *prior to targeting to a milestone / release*
   - [ ] (R) Minimum Two Week Window for GA e2e tests to prove flake free
 - [ ] (R) Graduation criteria is in place
   - [ ] (R) [all GA Endpoints](https://github.com/kubernetes/community/pull/1806) must be hit by [Conformance Tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/conformance-tests.md) 
-- [ ] (R) Production readiness review completed
-- [ ] (R) Production readiness review approved
+- [x] (R) Production readiness review completed
+- [x] (R) Production readiness review approved
 - [ ] "Implementation History" section is up-to-date for milestone
 - [ ] User-facing documentation has been created in [kubernetes/website], for publication to [kubernetes.io]
 - [ ] Supporting documentation—e.g., additional design documents, links to mailing list discussions/SIG meetings, relevant PRs/issues, release notes