fix embedder loading

Author: simonusher

Diff for: srai/embedders/hex2vec/embedder.py

@@ -277,6 +277,8 @@ def load(cls, path: Path) -> "Hex2VecEmbedder":
         Returns:
             Hex2VecEmbedder: The loaded embedder.
         """
+        if isinstance(path, str):
+            path = Path(path)
         with open(path / "config.json") as f:
             embedder_config = json.load(f)
         embedder = cls(**embedder_config["embedder_config"])