Update milestone to 1.31

Author: vinayakankugoyal

keps/sig-node/24-apparmor/kep.yaml

@@ -28,13 +28,13 @@ stage: stable
 # 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: "v1.30"
+latest-milestone: "v1.31"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.4"
   beta: "v1.4"
-  stable: "v1.30"
+  stable: "v1.31"
 
 # The following PRR answers are required at alpha release
 # List the feature gate name and the components for which it must be enabled