Update docs for Pod Priority Based Node Graceful Shutdown beta

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

content/en/docs/concepts/architecture/nodes.md

@@ -539,6 +539,9 @@ Using this feature, requires enabling the
 config's `ShutdownGracePeriodByPodPriority` to the desired configuration
 containing the pod priority class values and their respective shutdown periods.
 
+Metrics `graceful_shutdown_start_time_seconds` and `graceful_shutdown_end_time_seconds`
+are emitted under the kubelet subsystem to monitor node shutdowns.
+
 ## Swap memory management {#swap-memory}
 
 {{< feature-state state="alpha" for_k8s_version="v1.22" >}}

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

@@ -130,6 +130,7 @@ different Kubernetes components.
 | `GracefulNodeShutdown` | `false` | Alpha | 1.20 | 1.20 |
 | `GracefulNodeShutdown` | `true` | Beta | 1.21 | |
 | `GracefulNodeShutdownBasedOnPodPriority` | `false` | Alpha | 1.23 | |
+| `GracefulNodeShutdownBasedOnPodPriority` | `true` | Beta | 1.24 | |
 | `GRPCContainerProbe` | `false` | Alpha | 1.23 | |
 | `HonorPVReclaimPolicy` | `false` | Alpha | 1.23 | |
 | `HPAContainerMetrics` | `false` | Alpha | 1.20 | |