[zh] Sync cluster-level-pss.

Add code sample that will be applied to the cluster.

Add baseline pod yaml example.

Fix indentation of ordered list

Co-authored-by: Michael <haifeng.yao@daocloud.io>

content/zh-cn/docs/tutorials/security/cluster-level-pss.md

@@ -42,6 +42,7 @@ Pod 安全是一个准入控制器，当新的 Pod 被创建时，它会根据 K
 请查阅该版本的文档。
 
 ## {{% heading "prerequisites" %}}
+
 <!--
 Install the following on your workstation:
 
@@ -434,6 +435,8 @@ following:
 -->
 7. 在 default 名字空间下创建一个 Pod：
 
+   {{% code_sample file="security/example-baseline-pod.yaml" %}}
+
    ```shell
    kubectl apply -f https://k8s.io/examples/security/example-baseline-pod.yaml
    ```

content/zh-cn/examples/security/example-baseline-pod.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+spec:
+  containers:
+    - image: nginx
+      name: nginx
+      ports:
+        - containerPort: 80