Fix read_stream stream leakage

Author: LionNatsu

src/mcp/client/stdio/__init__.py

@@ -177,7 +177,8 @@ async def stdin_writer():
                 await terminate_windows_process(process)
             else:
                 process.terminate()
-            write_stream_reader.close()
+            read_stream.close()
+            write_stream.close()
 
 
 def _get_executable_command(command: str) -> str: