Bug Report

Is the issue related to model conversion?

No

Describe the bug

1. the onnx name is simple Chinese，such as “士大夫.onnx”

2.   output_file_path = 'D:\\士大夫.onnx'
     onnx.checker.check_model(output_file_path)```
   

3. after run ，throw ValidationError

   onnx.onnx_cpp2py_export.checker.ValidationError: Unable to open proto file: D:\士大夫.onnx. Please check if it is a valid proto. 
 [fail_check("Unable to open proto file: ", proto_path, ". Please check if it is a valid proto. ");]

System information

Windows
onnx version 1.15.0