fix: add default arg for push_to_hub (MinishLab#240)

Author: stephantul

model2vec/inference/model.py

@@ -65,7 +65,9 @@ def save_pretrained(self, path: str) -> None:
         """Save the model to a folder."""
         save_pipeline(self, path)
 
-    def push_to_hub(self, repo_id: str, subfolder: str, token: str | None = None, private: bool = False) -> None:
+    def push_to_hub(
+        self, repo_id: str, subfolder: str | None = None, token: str | None = None, private: bool = False
+    ) -> None:
         """
         Save a model to a folder, and then push that folder to the hf hub.
 
@@ -219,6 +221,7 @@ def _load_pipeline(
     """
     folder_or_repo_path = Path(folder_or_repo_path)
     model_filename = _DEFAULT_MODEL_FILENAME
+    head_pipeline_path: str | Path
     if folder_or_repo_path.exists():
         head_pipeline_path = folder_or_repo_path / model_filename
         if not head_pipeline_path.exists():