add exempt api kinds in mutating admission policies doc

Author: ghouscht

content/en/docs/reference/access-authn-authz/mutating-admission-policy.md

@@ -213,4 +213,19 @@ as well as:
 
 - `jsonpatch.escapeKey` - Performs JSONPatch key escaping. `~` and  `/` are escaped as `~0` and `~1` respectively.
 
-Only property names of the form `[a-zA-Z_.-/][a-zA-Z0-9_.-/]*` are accessible.
+Only property names of the form `[a-zA-Z_.-/][a-zA-Z0-9_.-/]*` are accessible.
+
+## API kinds exempt from mutating admission
+
+There are certain API kinds that are exempt from admission-time mutation. For example, you can't create a MutatingAdmissionPolicy that changes a MutatingAdmissionPolicy.
+
+The list of exempt API kinds is:
+
+* [ValidatingAdmissionPolicies]({{< relref "/docs/reference/kubernetes-api/policy-resources/validating-admission-policy-v1/" >}})
+* [ValidatingAdmissionPolicyBindings]({{< relref "/docs/reference/kubernetes-api/policy-resources/validating-admission-policy-binding-v1/" >}})
+* MutatingAdmissionPolicies
+* MutatingAdmissionPolicyBindings
+* [TokenReviews]({{< relref "/docs/reference/kubernetes-api/authentication-resources/token-review-v1/" >}})
+* [LocalSubjectAccessReviews]({{< relref "/docs/reference/kubernetes-api/authorization-resources/local-subject-access-review-v1/" >}})
+* [SelfSubjectAccessReviews]({{< relref "/docs/reference/kubernetes-api/authorization-resources/self-subject-access-review-v1/" >}})
+* [SelfSubjectReviews]({{< relref "/docs/reference/kubernetes-api/authentication-resources/self-subject-review-v1/" >}})

content/en/docs/reference/access-authn-authz/validating-admission-policy.md

@@ -513,5 +513,5 @@ The list of exempt API kinds is:
 * MutatingAdmissionPolicyBindings
 * [TokenReviews]({{< relref "/docs/reference/kubernetes-api/authentication-resources/token-review-v1/" >}})
 * [LocalSubjectAccessReviews]({{< relref "/docs/reference/kubernetes-api/authorization-resources/local-subject-access-review-v1/" >}})
-* [SelfSubjectAccessReviews]({{< relref "/docs/reference/kubernetes-api/authorization-resources/self-subject-access-review-v1/">}})
+* [SelfSubjectAccessReviews]({{< relref "/docs/reference/kubernetes-api/authorization-resources/self-subject-access-review-v1/" >}})
 * [SelfSubjectReviews]({{< relref "/docs/reference/kubernetes-api/authentication-resources/self-subject-review-v1/" >}})