Move PSP into Security concepts section

The logical navigation definitely works better if Pod Security admission
and PodSecurityPolicy are pages in the same section. Make It So.

Co-authored-by: Rey Lejano <rlejano@gmail.com>

content/en/docs/tasks/configure-pod-container/security-context.md

@@ -487,6 +487,6 @@ kubectl delete pod security-context-demo-4
 * [Tuning Docker with the newest security enhancements](https://github.com/containerd/containerd/blob/main/docs/cri/config.md)
 * [Security Contexts design document](https://git.k8s.io/community/contributors/design-proposals/auth/security_context.md)
 * [Ownership Management design document](https://git.k8s.io/community/contributors/design-proposals/storage/volume-ownership-management.md)
-* [Pod Security Policies](/docs/concepts/policy/pod-security-policy/)
+* [PodSecurityPolicy](/docs/concepts/security/pod-security-policy/)
 * [AllowPrivilegeEscalation design
   document](https://git.k8s.io/community/contributors/design-proposals/auth/no-new-privs.md)

content/en/docs/tasks/configure-pod-container/static-pod.md

@@ -182,8 +182,7 @@ static-web   1/1     Running   0               2m
 ```
 
 {{< note >}}
-Make sure the kubelet has permission to create the mirror Pod in the API server. If not, the creation request is rejected by the API server. See
-[PodSecurityPolicy](/docs/concepts/policy/pod-security-policy/).
+Make sure the kubelet has permission to create the mirror Pod in the API server. If not, the creation request is rejected by the API server. See [Pod Security admission](/docs/concepts/security/pod-security-admission) and [PodSecurityPolicy](/docs/concepts/security/pod-security-policy/).
 {{< /note >}}
 
 {{< glossary_tooltip term_id="label" text="Labels" >}} from the static Pod are