Update KEP 2593 kep.yaml with correct milestones

Author: rahulkjoshi

keps/sig-network/2593-multiple-cluster-cidrs/kep.yaml

@@ -20,13 +20,13 @@ stage: alpha
 # 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: "v1.23"
+latest-milestone: "v1.24"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
-  alpha: "v1.23"
-  beta: "v1.24"
-  stable: "v1.26"
+  alpha: "v1.24"
+  beta: "v1.25"
+  stable: "v1.27"
 
 feature-gates:
   - name: ClusterCIDRConfig