graduate elastic indexed job to stable

Author: ahg-g

keps/prod-readiness/sig-apps/3715.yaml

@@ -1,3 +1,6 @@
 kep-number: 3715
 beta:
   approver: "@wojtek-t"
+stable:
+  approver: "@wojtek-t"
+

keps/sig-apps/3715-elastic-indexed-job/README.md

@@ -494,7 +494,9 @@ enhancement:
 
 ### Version Skew Strategy
 
-N/A. This feature doesn't impact nodes.
+In a multi-master setup, when the cluster has skewed apiservers, some create requests
+may get accepted and some may get rejected. This is a transient state until all instances are on the same k8s version. 
+
 
 <!--
 If applicable, how will the component handle version skew with other
@@ -595,7 +597,8 @@ The api-server will accept mutation requests to `spec.completions` for `Indexed`
 
 ###### Are there any tests for feature enablement/disablement?
 
-N/A
+See [Job integration tests](https://github.com/kubernetes/kubernetes/blob/a06568062c41b4f0f903dcb78aa6ea348bbdecfc/test/integration/job/job_test.go#L2746)
+
 
 <!--
 The e2e framework does not currently support enabling or disabling feature
@@ -641,7 +644,7 @@ that might indicate a serious problem?
 
 ###### Were upgrade and rollback tested? Was the upgrade->downgrade->upgrade path tested?
 
-It will be tested manually prior to beta launch.
+It was tested manually prior to beta launch, but also given the feature effectively is only relaxing validation (so is purely in-memory), upgrade/downgrade boils down to actual feature tests.
 
 <!--
 Describe manual testing that was done and the outcomes.
@@ -893,6 +896,7 @@ N/A.
 
 ## Implementation History
 
+- 2024-06-12: Graduated to stable.
 - 2023-01-10: Proposed KEP.
 
 <!--

keps/sig-apps/3715-elastic-indexed-job/kep.yaml

@@ -15,17 +15,17 @@ see-also:
   - "/keps/sig-apps/2214-indexed-job"
 
 # The target maturity stage in the current dev cycle for this KEP.
-stage: beta
+stage: stable
 
 # The most recent milestone for which work toward delivery of this KEP has been
 # done. This can be the current (upcoming) milestone, if it is being actively
 # worked on.
-latest-milestone: "v1.27"
+latest-milestone: "v1.31"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   beta: "1.27"
-  stable: "v1.28"
+  stable: "v1.31"
 
 feature-gates:
   - name: ElasticIndexedJob