Fix nginx version, IPVS removal, cgroups v2 and Redis config

13_kubernetes_concepts/13.5_practice.md

@@ -31,7 +31,7 @@ spec:
     spec:
       containers:
       - name: nginx
-        image: nginx:1.30
+        image: nginx:1.28
         ports:
         - containerPort: 80
 ```
@@ -73,7 +73,7 @@ kubectl get svc nginx-service
 
 ### 13.5.4 步骤 3：模拟滚动更新
 
-修改 `nginx-deployment.yaml`，将镜像版本改为 `nginx:1.30-alpine`。
+修改 `nginx-deployment.yaml`，将镜像版本改为 `nginx:1.28-alpine`。
 
 ```bash
 kubectl apply -f nginx-deployment.yaml