Update compatibility version kep.yaml with components

Author: Jefftree

keps/sig-architecture/4330-compatibility-versions/kep.yaml

@@ -42,6 +42,7 @@ feature-gates:
     components:
       - kube-apiserver
       - kube-controller-manager
+      - kube-scheduler
 disable-supported: true
 
 # The following PRR answers are required at beta release