inline code block is not displayed (#8940)

* inline code block is not displayed

Using `kubectl get storageclass` instead of 

```
       kubectl get storageclass
```

correctly shows the code markup.

* Update change-default-storage-class.md

* reformat markdown for nested list

content/en/docs/tasks/administer-cluster/change-default-storage-class.md

@@ -39,13 +39,17 @@ for details about addon manager and how to disable individual addons.
 
 1. List the StorageClasses in your cluster: 
 
+    ```bash
     kubectl get storageclass
+    ```
 
     The output is similar to this:
 
+    ```bash
     NAME                 TYPE
     standard (default)   kubernetes.io/gce-pd
     gold                 kubernetes.io/gce-pd
+    ```
 
     The default StorageClass is marked by `(default)`.
 
@@ -57,7 +61,9 @@ for details about addon manager and how to disable individual addons.
 
       To mark a StorageClass as non-default, you need to change its value to `false`:
 
+      ```bash
       kubectl patch storageclass <your-class-name> -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"false"}}}'
+      ```
 
       where `<your-class-name>` is the name of your chosen StorageClass.
 
@@ -66,7 +72,9 @@ for details about addon manager and how to disable individual addons.
       Similarly to the previous step, you need to add/set the annotation
       `storageclass.kubernetes.io/is-default-class=true`.
 
+      ```bash
       kubectl patch storageclass <your-class-name> -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
+      ```
 
       Please note that at most one StorageClass can be marked as default. If two
       or more of them are marked as default, Kubernetes ignores the annotation,
@@ -74,13 +82,17 @@ for details about addon manager and how to disable individual addons.
 
 1. Verify that your chosen StorageClass is default:
 
+      ```bash
       kubectl get storageclass
+      ```
 
       The output is similar to this:
 
+      ```bash
       NAME             TYPE
       standard         kubernetes.io/gce-pd
       gold (default)   kubernetes.io/gce-pd
+      ```
 
 {{% /capture %}}