Updated latest milestone for PodDeletionCost

Author: ahg-g

keps/sig-apps/2255-pod-cost/kep.yaml

@@ -27,7 +27,7 @@ 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: "v1.21"
+latest-milestone: "v1.22"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone: