adjust docs for pod ready++ (#10049)

content/en/docs/concepts/workloads/pods/pod-lifecycle.md

@@ -157,7 +157,7 @@ Note that the information reported as Pod status depends on the current
 
 ## Pod readiness gate
 
-{{< feature-state for_k8s_version="v1.11" state="alpha" >}}
+{{< feature-state for_k8s_version="v1.12" state="beta" >}}
 
 In order to add extensibility to Pod readiness by enabling the injection of
 extra feedbacks or signals into `PodStatus`, Kubernetes 1.11 introduced a
@@ -203,9 +203,11 @@ when both the following statements are true:
 To facilitate this change to Pod readiness evaluation, a new Pod condition
 `ContainersReady` is introduced to capture the old Pod `Ready` condition.
 
-As an alpha feature, the "Pod Ready++" feature has to be explicitly enabled by
+In K8s 1.11, as an alpha feature, the "Pod Ready++" feature has to be explicitly enabled by
 setting the `PodReadinessGates` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/)
-to True.
+to true.
+
+In K8s 1.12, the feature is enabled by default.
 
 ## Restart policy
 

content/en/docs/reference/command-line-tools-reference/feature-gates.md

@@ -81,6 +81,7 @@ different Kubernetes components.
 | `PersistentLocalVolumes` | `true` | Beta | 1.10 | |
 | `PodPriority` | `false` | Alpha | 1.8 | |
 | `PodReadinessGates` | `false` | Alpha | 1.11 | |
+| `PodReadinessGates` | `true` | Beta | 1.12 | |
 | `PodShareProcessNamespace` | `false` | Alpha | 1.10 | |
 | `PVCProtection` | `false` | Alpha | 1.9 | 1.9 |
 | `ReadOnlyAPIDataVolumes` | `true` | Deprecated | 1.10 | |