Correct the number of new API endpoints in README.md.

Author: klapaudius

README.md

@@ -96,7 +96,7 @@ klp_mcp_server:
     type: php
 ```
 
-**You're all done!** Upon completing this setup, your project will include two new API endpoints:
+**You're all done!** Upon completing this setup, your project will include 3 new API endpoints:
 
 - **Streaming Endpoint for MCP Clients**: `GET /{default_path}/sse`
 - **Request Submission Endpoint**: `POST /{default_path}/messages`