Merge pull request #4695 from rexagod/2305u

Update `latest-milestone` for KEP-2305

Author: k8s-ci-robot

keps/sig-instrumentation/2305-metrics-cardinality-enforcement/kep.yaml

@@ -18,8 +18,8 @@ approvers:
 creation-date: 2020-04-15
 last-updated: 2024-01-20
 stage: stable
-status: implementable
-latest-milestone: "v1.30"
+status: implemented
+latest-milestone: "v1.31"
 milestone:
   alpha: "v1.21"
   beta: "v1.28"