Adjust yaml indentation on allowedHostPaths example (#27731)

* Adjust yaml indentation on allowedHostPaths

allowedHostPaths is an attribute inside spec: of PSP, so the sample needs to be shifted to match the YAML.

* Adjusted the PSP example allowedHostPaths coments

Adjusted the whole example (including the #coments)

Author: bgsilvait

content/en/docs/concepts/policy/pod-security-policy.md

@@ -464,12 +464,12 @@ allowed prefix, and a `readOnly` field indicating it must be mounted read-only.
 For example:
 
 ```yaml
-allowedHostPaths:
-  # This allows "/foo", "/foo/", "/foo/bar" etc., but
-  # disallows "/fool", "/etc/foo" etc.
-  # "/foo/../" is never valid.
-  - pathPrefix: "/foo"
-    readOnly: true # only allow read-only mounts
+  allowedHostPaths:
+    # This allows "/foo", "/foo/", "/foo/bar" etc., but
+    # disallows "/fool", "/etc/foo" etc.
+    # "/foo/../" is never valid.
+    - pathPrefix: "/foo"
+      readOnly: true # only allow read-only mounts
 ```
 
 {{< warning >}}There are many ways a container with unrestricted access to the host