Merge pull request kubernetes#3236 from deads2k/prr-beta

update PRR to explicitly require field feedback to go GA

Author: k8s-ci-robot

keps/NNNN-kep-template/README.md

@@ -495,6 +495,9 @@ Even if applying deprecation policies, they may still surprise some users.
 
 <!--
 This section must be completed when targeting beta to a release.
+
+For GA, this section is required: approvers should be able to confirm the
+previous answers based on experience in the field.
 -->
 
 ###### How can an operator determine if the feature is in use by workloads?
@@ -665,6 +668,9 @@ This through this both in small and large cases, again with respect to the
 <!--
 This section must be completed when targeting beta to a release.
 
+For GA, this section is required: approvers should be able to confirm the
+previous answers based on experience in the field.
+
 The Troubleshooting section currently serves the `Playbook` role. We may consider
 splitting it into a dedicated `Playbook` document (potentially with some monitoring
 details). For now, we leave it here.