KEP-3299: update beta and GA milestone

Signed-off-by: Anish Ramasekar <[email protected]>

Author: aramase

keps/sig-auth/3299-kms-v2-improvements/kep.yaml

@@ -19,8 +19,8 @@ latest-milestone: "v1.25"
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.25"
-  beta: "v1.26"
-  stable: "v1.27"
+  beta: "v1.27"
+  stable: "v1.28"
 feature-gates:
   - name: KMSv2
     components: