4471: document graduation to beta

Author: chrischdi

keps/sig-cluster-lifecycle/kubeadm/4471-cp-join-kubelet-local-apiserver/README.md

@@ -657,6 +657,8 @@ Major milestones might include:
 - 08.02.2024: KEP draft created.
 - 07.05.2024: KEP marked as implementable for 1.31 or later.
 - 12.07.2024: KEP adjusted to match discussed implementation.
+- 15.07.2024: KEP alpha implementation merged.
+- 06.02.2024: PRs to promote the feature gate to Beta.
 
 ## Drawbacks
 

keps/sig-cluster-lifecycle/kubeadm/4471-cp-join-kubelet-local-apiserver/kep.yaml

@@ -7,6 +7,7 @@ participating-sigs:
   - sig-cluster-lifecycle
 status: implementable
 creation-date: 2024-2-1
+last-updated: 2025-02-06
 reviewers:
   - "@neolit123"
   - "@SataQiu"
@@ -16,4 +17,4 @@ approvers:
   - "@SataQiu"
   - "@pacoxu"
 latest-milestone: "0.0"
-stage: "alpha"
+stage: "beta"