Add codenew shortcode to configure-pod-configmap task file and sanitize the example files (#13078)

content/en/examples/pods/pod-configmap-volume.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "ls /etc/config/" ]
+      volumeMounts:
+      - name: config-volume
+        mountPath: /etc/config
+  volumes:
+    - name: config-volume
+      configMap:
+        # Provide the name of the ConfigMap containing the files you want
+        # to add to the container
+        name: special-config
+  restartPolicy: Never