Tweak indentation on portforward page

This PR fixes the indentation nits in the
`port-forward-access-application-cluster` page.
We are not supposed to indent lines by 4 spaces because such
indentations may mislead the markdown parser to render them as code
snippets.

content/en/docs/tasks/access-application-cluster/port-forward-access-application-cluster.md

@@ -11,19 +11,11 @@ This page shows how to use `kubectl port-forward` to connect to a MongoDB
 server running in a Kubernetes cluster. This type of connection can be useful
 for database debugging.
 
-
-
-
 ## {{% heading "prerequisites" %}}
 
-
 * {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
-
 * Install [MongoDB Shell](https://www.mongodb.com/try/download/shell).
 
-
-
-
 <!-- steps -->
 
 ## Creating MongoDB deployment and service
@@ -80,7 +72,6 @@ for database debugging.
    mongo-75f59d57f4   1         1         1       3m12s
    ```
 
-
 2. Create a Service to expose MongoDB on the network:
 
    ```shell
@@ -119,7 +110,7 @@ for database debugging.
    27017
    ```
 
-    (this is the TCP port allocated to MongoDB on the internet).
+   27017 is the TCP port allocated to MongoDB on the internet.
 
 ## Forward a local port to a port on the Pod
 
@@ -162,11 +153,9 @@ for database debugging.
    Forwarding from [::1]:28015 -> 27017
    ```
 
-{{< note >}}
-
-`kubectl port-forward` does not return. To continue with the exercises, you will need to open another terminal.
-
-{{< /note >}}
+   {{< note >}}
+   `kubectl port-forward` does not return. To continue with the exercises, you will need to open another terminal.
+   {{< /note >}}
 
 2. Start the MongoDB command line interface:
 
@@ -204,7 +193,6 @@ Forwarding from 127.0.0.1:63753 -> 27017
 Forwarding from [::1]:63753 -> 27017
 ```
 
-
 <!-- discussion -->
 
 ## Discussion
@@ -219,9 +207,7 @@ The support for UDP protocol is tracked in
 [issue 47862](https://github.com/kubernetes/kubernetes/issues/47862).
 {{< /note >}}
 
-
-
-
 ## {{% heading "whatsnext" %}}
 
 Learn more about [kubectl port-forward](/docs/reference/generated/kubectl/kubectl-commands/#port-forward).
+