KEP-3619: update beta milestone from v1.32 -> v1.33(it's still tentative)

The beta promotion milestone is tenative because it will wait for containerd v2 got released and it will become popular.

Author: everpeace

keps/sig-node/3619-supplemental-groups-policy/README.md

@@ -1149,7 +1149,6 @@ Major milestones might include:
 
 - 2023-02-10: Initial KEP published.
 - v1.31.0(2024-08-13): Alpha
-- v1.32.0: Beta (enabled by default)
 
 ## Drawbacks
 

keps/sig-node/3619-supplemental-groups-policy/kep.yaml

@@ -24,12 +24,16 @@ 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: "v1.32"
+latest-milestone: "v1.33"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.31"
-  beta: "v1.32"
+# NOTE: This is tentative milestone.
+#       It is because the beta promotion will wait for containerd v2 got released.
+#       and it will become popular.
+# ref: https://github.com/kubernetes/enhancements/pull/4895#discussion_r1790492414
+  beta: "v1.33"
   stable: "v1.yy"
 
 # The following PRR answers are required at alpha release