refactor(content.en.docs.tutorials.security.SecComp): add sha to kindes/node image

Author: dancer1325

content/en/docs/tutorials/security/seccomp.md

@@ -482,15 +482,15 @@ kind: Cluster
 apiVersion: kind.x-k8s.io/v1alpha4
 nodes:
   - role: control-plane
-    image: kindest/node:v1.28.0
+    image: kindest/node:v1.28.0@sha256:9f3ff58f19dcf1a0611d11e8ac989fdb30a28f40f236f59f0bea31fb956ccf5c
     kubeadmConfigPatches:
       - |
         kind: JoinConfiguration
         nodeRegistration:
           kubeletExtraArgs:
             seccomp-default: "true"
   - role: worker
-    image: kindest/node:v1.28.0
+    image: kindest/node:v1.28.0@sha256:9f3ff58f19dcf1a0611d11e8ac989fdb30a28f40f236f59f0bea31fb956ccf5c
     kubeadmConfigPatches:
       - |
         kind: JoinConfiguration