[rest spec] fill in documentation links for security.{put,delete}_privileges (#48482)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/plugin/src/test/resources/rest-api-spec/api/security.delete_privileges.json

@@ -1,7 +1,7 @@
 {
   "security.delete_privileges":{
     "documentation":{
-      "url":"TODO"
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-delete-privilege.html"
     },
     "stability":"stable",
     "url":{

x-pack/plugin/src/test/resources/rest-api-spec/api/security.put_privileges.json

@@ -1,7 +1,7 @@
 {
   "security.put_privileges":{
     "documentation":{
-      "url":"TODO"
+      "url": "https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-put-privileges.html"
     },
     "stability":"stable",
     "url":{