graduate PersistentVolumeLastPhaseTransitionTime to GA in v1.31

content/en/docs/concepts/storage/persistent-volumes.md

@@ -766,18 +766,13 @@ You can see the name of the PVC bound to the PV using `kubectl describe persiste
 
 #### Phase transition timestamp
 
-{{< feature-state for_k8s_version="v1.29" state="beta" >}}
+{{< feature-state feature_gate_name="PersistentVolumeLastPhaseTransitionTime" >}}
 
 The `.status` field for a PersistentVolume can include an alpha `lastPhaseTransitionTime` field. This field records
 the timestamp of when the volume last transitioned its phase. For newly created
 volumes the phase is set to `Pending` and `lastPhaseTransitionTime` is set to
 the current time.
 
-{{< note >}}
-You need to enable the `PersistentVolumeLastPhaseTransitionTime` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/)
-to use or see the `lastPhaseTransitionTime` field.
-{{< /note >}}
-
 ## PersistentVolumeClaims
 
 Each PVC contains a spec and status, which is the specification and status of the claim.

content/en/docs/reference/command-line-tools-reference/feature-gates/persistent-volume-last-phase-transition-time.md

@@ -13,6 +13,10 @@ stages:
   - stage: beta
     defaultValue: true
     fromVersion: "1.29"
+    toVersion: "1.29"
+  - stage: stable
+    defaultValue: true
+    fromVersion: "1.31"
 ---
 Adds a new field to PersistentVolume
 which holds a timestamp of when the volume last transitioned its phase.