Move sample YAML files to the correct place (#12123)

This PR is also an attempt to fix #12117.

Closes: #12117

content/zh/examples/pods/inject/secret-envars-pod.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: secret-envars-test-pod
+spec:
+  containers:
+  - name: envars-test-container
+    image: nginx
+    env:
+    - name: SECRET_USERNAME
+      valueFrom:
+        secretKeyRef:
+          name: test-secret
+          key: username
+    - name: SECRET_PASSWORD
+      valueFrom:
+        secretKeyRef:
+          name: test-secret
+          key: password

content/zh/examples/pods/inject/secret-pod.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: secret-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: nginx
+      volumeMounts:
+          # name must match the volume name below
+          - name: secret-volume
+            mountPath: /etc/secret-volume
+  # The secret data is exposed to Containers in the Pod through a Volume.
+  volumes:
+    - name: secret-volume
+      secret:
+        secretName: test-secret

content/zh/examples/pods/inject/secret.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: test-secret
+data:
+  username: bXktYXBwCg==
+  password: Mzk1MjgkdmRnN0piCg==