fix: Update README.md (#268)

Co-authored-by: Jacob MacDonald <[email protected]>

Author: juan-campuzano

pkgs/dart_mcp/README.md

@@ -18,7 +18,7 @@ Each mixin has doc comments explaining how to use it - some may require you to
 provide implementations of methods, while others may just expose new methods
 that you can call.
 
-See the [server example](example/simple_server.dart) for some example code.
+See the [examples](example/) for some example code (server examples end in `_server.dart`).
 
 ### Invoking Client Capabilities