FileSysteBlobLoader: Expand user path (#10133)

Fix for: https://github.com/langchain-ai/langchain/issues/10019

Verified fix manually

libs/langchain/langchain/document_loaders/blob_loaders/file_system.py

@@ -99,7 +99,7 @@ class FileSystemBlobLoader(BlobLoader):
         else:
             raise TypeError(f"Expected str or Path, got {type(path)}")
 
-        self.path = _path
+        self.path = _path.expanduser()  # Expand user to handle ~
         self.glob = glob
         self.suffixes = set(suffixes or [])
         self.show_progress = show_progress