Ko: Third Korean l10n work for release-1.20

- Update outdated files in the dev-1.20-ko.3 (1) (#26131)
- Update outdated files in the dev-1.20-ko.3 branch (2) (#26122)

Co-authored-by: seokho-son <shsongist@gmail.com>
Co-authored-by: Jerry Park <jaehwa@gmail.com>

content/ko/examples/service/access/frontend-deployment.yaml

@@ -0,0 +1,27 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+spec:
+  selector:
+    matchLabels:
+      app: hello
+      tier: frontend
+      track: stable
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: hello
+        tier: frontend
+        track: stable
+    spec:
+      containers:
+        - name: nginx
+          image: "gcr.io/google-samples/hello-frontend:1.0"
+          lifecycle:
+            preStop:
+              exec:
+                command: ["/usr/sbin/nginx","-s","quit"]
+...