Fixed the command line

Fixed the command line which was causing an error.

docs/user-guide/configmap/index.md

@@ -1,3 +1,4 @@
+
 ---
 ---
 Many applications require configuration via some combination of config files, command line
@@ -362,7 +363,7 @@ spec:
   containers:
     - name: test-container
       image: gcr.io/google_containers/busybox
-      command: ["cat", "/etc/config/special.how" ]
+      command: ["/bin/sh","-c", "cat", "/etc/config/special.how" ]
       volumeMounts:
       - name: config-volume
         mountPath: /etc/config
@@ -390,7 +391,7 @@ spec:
   containers:
     - name: test-container
       image: gcr.io/google_containers/busybox
-      command: [ "/bin/sh", "cat", "/etc/config/path/to/special-key" ]
+      command: [ "/bin/sh", "-c", "cat", "/etc/config/path/to/special-key" ]
       volumeMounts:
       - name: config-volume
         mountPath: /etc/config