Include link to Pod Security Admission in the PodSecurityPolicy deprecation notice (#31475)

* Include link to Pod Security Admission in the PodSecurityPolicy deprecation notice

Add a link to the Pod Security Admission feature, which replaces PodSecurityPolicy. Currently users who read this page may not realize what the replacement is. The linked blog post talks about the KEP that created Pod Security Admission, but with no direct link.

* Remove link prefix

Co-authored-by: Jihoon Seo <[email protected]>

Co-authored-by: Jihoon Seo <[email protected]>

Author: WilliamDenniss

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

@@ -11,7 +11,8 @@ weight: 30
 
 {{< feature-state for_k8s_version="v1.21" state="deprecated" >}}
 
-PodSecurityPolicy is deprecated as of Kubernetes v1.21, and will be removed in v1.25. For more information on the deprecation,
+PodSecurityPolicy is deprecated as of Kubernetes v1.21, and will be removed in v1.25. It has been replaced by
+[Pod Security Admission](/docs/concepts/security/pod-security-admission/). For more information on the deprecation,
 see [PodSecurityPolicy Deprecation: Past, Present, and Future](/blog/2021/04/06/podsecuritypolicy-deprecation-past-present-and-future/).
 
 Pod Security Policies enable fine-grained authorization of pod creation and