Documentation/default fix for keycloak modules (#37192)

* fix validate_certs doc and remove default for auth_client_id

* document admin-cli default instead of removing it

lib/ansible/utils/module_docs_fragments/keycloak.py

@@ -31,6 +31,7 @@ options:
     auth_client_id:
         description:
             - OpenID Connect I(client_id) to authenticate to the API with.
+        default: admin-cli
         required: true
 
     auth_realm:
@@ -60,4 +61,5 @@ options:
         description:
             - Verify TLS certificates (do not disable this in production).
         default: True
+        type: bool
 '''