Bump SelectorIndex to beta

Author: wojtek-t

staging/src/k8s.io/apiserver/pkg/features/kube_features.go

@@ -138,8 +138,9 @@ const (
 	// Deprecates and removes SelfLink from ObjectMeta and ListMeta.
 	RemoveSelfLink featuregate.Feature = "RemoveSelfLink"
 
-	// owner: @shaloulcy
+	// owner: @shaloulcy, @wojtek-t
 	// alpha: v1.18
+	// beta: v1.19
 	//
 	// Allows label and field based indexes in apiserver watch cache to accelerate list operations.
 	SelectorIndex featuregate.Feature = "SelectorIndex"
@@ -173,6 +174,6 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	WatchBookmark:           {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 	APIPriorityAndFairness:  {Default: false, PreRelease: featuregate.Alpha},
 	RemoveSelfLink:          {Default: false, PreRelease: featuregate.Alpha},
-	SelectorIndex:           {Default: false, PreRelease: featuregate.Alpha},
+	SelectorIndex:           {Default: true, PreRelease: featuregate.Beta},
 	WarningHeaders:          {Default: true, PreRelease: featuregate.Beta},
 }