add extra warning for serverless private endpoint

Author: oarbusi

cfn-resources/serverless-private-endpoint/README.md

@@ -1,6 +1,6 @@
 # MongoDB::Atlas::ServerlessPrivateEndpoint
 
-**WARNING:** This resource is deprecated and will be removed in May 2025. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/).
+**WARNING:** This resource is deprecated and will be removed in May 2025. If you try to create a ServerlessPrivateEndpoint for a newly created ServerlessInstance, it will fail because the newly created ServerlessInstance are now Flex clusters. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/).
 
 Resource for creating and managing [Private Endpoint Services](https://www.mongodb.com/docs/atlas/reference/api-resources-spec/v2/#tag/Serverless-Private-Endpoints).
 

cfn-resources/serverless-private-endpoint/docs/README.md

@@ -1,6 +1,6 @@
 # MongoDB::Atlas::ServerlessPrivateEndpoint
 
-**WARNING:** This resource is deprecated and will be removed in May 2025. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/). Returns, adds, edits, and removes private endpoints for serverless instances. To learn more, see the Atlas Administration API tab on the following tutorial.
+**WARNING:** This resource is deprecated and will be removed in May 2025. If you try to create a ServerlessPrivateEndpoint for a newly created ServerlessInstance, it will fail because the newly created ServerlessInstance are now Flex clusters. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/). Returns, adds, edits, and removes private endpoints for serverless instances. To learn more, see the Atlas Administration API tab on the following tutorial.
 
 ## Syntax
 

cfn-resources/serverless-private-endpoint/mongodb-atlas-serverlessprivateendpoint.json

@@ -1,6 +1,6 @@
 {
   "typeName": "MongoDB::Atlas::ServerlessPrivateEndpoint",
-  "description": "**WARNING:** This resource is deprecated and will be removed in May 2025. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/). Returns, adds, edits, and removes private endpoints for serverless instances. To learn more, see the Atlas Administration API tab on the following tutorial.",
+  "description": "**WARNING:** This resource is deprecated and will be removed in May 2025. If you try to create a ServerlessPrivateEndpoint for a newly created ServerlessInstance, it will fail because the newly created ServerlessInstance are now Flex clusters. For more details, see [Migrate your programmatic tools from M2, M5, or Serverless Instances to Flex Clusters](https://www.mongodb.com/docs/atlas/flex-migration/). Returns, adds, edits, and removes private endpoints for serverless instances. To learn more, see the Atlas Administration API tab on the following tutorial.",
   "sourceUrl": "https://github.com/mongodb/mongodbatlas-cloudformation-resources/tree/master/cfn-resources/serverless-private-endpoint",
   "definitions": {
     "awsPrivateEndpointConfig": {