Update demo/README.md

Co-authored-by: Christopher Hertel <[email protected]>

Author: TomHart

demo/README.md

@@ -115,7 +115,7 @@ To add the server, add the following configuration to your MCP Client's settings
 You can test the MCP server by running the following command to start the MCP client:
 
 ```shell
-php bin/console mcp:client
+php bin/console mcp:server
 ```
 
 Then, paste `{"method":"tools/list","jsonrpc":"2.0","id":1}` to list the tools available on the MCP server.