KEP-2033: KubeletInUserNamespace: postpone beta to v1.36

kubernetes/kubernetes PR 134639 was approved and got the `lgtm` label,
however, it was not merged in v1.35.

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

Author: AkihiroSuda

keps/sig-node/2033-kubelet-in-userns-aka-rootless/README.md

@@ -728,7 +728,7 @@ in back-to-back releases.
   - https://github.com/GoogleCloudPlatform/anthos-samples/blob/8aff62c3f0bd835bda7479a01a591e1849c48fe9/anthos-attached-clusters/kind/main.tf#L37
   - https://github.com/GoogleCloudPlatform/cloud-solutions/blob/pino-logging-gcp-config-v1.1.0/projects/k8s-hybrid-neg-controller/hack/kind-cluster-config.yaml#L24
   - https://github.com/GoogleCloudPlatform/solutions-workshops/blob/grpc-xds/v0.5.0/grpc-xds/hack/kind-cluster-config-2.yaml#L24
-  In beta, [`NodeSystemInfo`](https://pkg.go.dev/k8s.io/api/core/v1#NodeSystemInfo) will be updated to include `RunningInUserNS *bool`.
+  In beta, nodes will have `kubernetes.io/running-in-user-namespace: <BOOL>` labels.
 
 - GA: Assuming no negative user feedback based on production experience, promote after >= 2 releases in beta.
   Requirements:
@@ -943,8 +943,7 @@ checking if there are objects with field X set) may be a last resort. Avoid
 logs or events for this purpose.
 -->
 
-[`NodeSystemInfo`](https://pkg.go.dev/k8s.io/api/core/v1#NodeSystemInfo) will have `RunningInUserNS *bool`
-to indicate whether the node is running in UserNS.
+Nodes will have `kubernetes.io/running-in-user-namespace: <BOOL>` labels.
 
 ###### How can someone using this feature know that it is working for their instance?
 
@@ -960,7 +959,7 @@ Recall that end users cannot usually observe component logs or access metrics.
 - [ ] Events
   - Event Reason:
 - [X] API .status
-  - Condition name: [`NodeSystemInfo`](https://pkg.go.dev/k8s.io/api/core/v1#NodeSystemInfo) will have `RunningInUserNS *bool`
+  - Condition name: Nodes will have `kubernetes.io/running-in-user-namespace: <BOOL>` labels.
   - Other field: 
 - [ ] Other (treat as last resort)
   - Details:
@@ -1219,7 +1218,7 @@ Major milestones might include:
 - 2019-11-19: present KEP to SIG-node (cgroup v2 version)
 - 2020-07-07: the cgroup v2 support is in `implementable` status
 - 2021-08-04: Kubernetes v1.22 (Alpha)
-- 2025-12-XX: Kubernetes v1.35 (Beta)
+- 2026-04-XX: Kubernetes v1.36 (Beta)
 
 ## Drawbacks
 

keps/sig-node/2033-kubelet-in-userns-aka-rootless/kep.yaml

@@ -29,12 +29,12 @@ stage: beta
 # 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: "v1.35"
+latest-milestone: "v1.36"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.22"
-  beta: "v1.35"
+  beta: "v1.36"
 
 # The following PRR answers are required at alpha release
 # List the feature gate name and the components for which it must be enabled