Update README.md

Author: yoanm

README.md

@@ -11,6 +11,10 @@ Symfony JSON-RPC HTTP Server to convert an HTTP json-rpc request into HTTP json-
 
 Symfony bundle for [`yoanm/jsonrpc-server-sdk`](https://raw.githubusercontent.com/yoanm/php-jsonrpc-server-sdk)
 
+See [yoanm/symfony-jsonrpc-params-validator](https://github.com/yoanm/symfony-jsonrpc-params-validator) for params validation. And [yoanm/symfony-jsonrpc-params-sf-constraints-doc](https://github.com/yoanm/symfony-jsonrpc-params-sf-constraints-doc) for params documentation
+
+See [yoanm/symfony-jsonrpc-http-server-doc](https://github.com/yoanm/symfony-jsonrpc-http-server-doc) for documentation generation.
+
 ## How to use
 
 Once configured, your project is ready to handle HTTP `POST` request on `/json-rpc` endpoint.