fix config path for windows system (#3501)

Co-authored-by: Trawinski, Dariusz <[email protected]>

Author: Huanli-Gong

demos/common/export_models/export_model.py

@@ -20,6 +20,7 @@
 import json
 import shutil
 import tempfile
+from pathlib import Path
 
 def add_common_arguments(parser):
     parser.add_argument('--model_repository_path', required=False, default='models', help='Where the model should be exported to', dest='model_repository_path')
@@ -358,6 +359,7 @@ def get_models_max_context(tmpdirname, config_filename):
         return None
 
 def add_servable_to_config(config_path, mediapipe_name, base_path):
+    base_path = Path(base_path).as_posix()
     print(config_path, mediapipe_name, base_path)
     if not os.path.isfile(config_path):
         print("Creating new config file")