fix: handle missing 'x-ms-file-name' header in _download_file method

Author: pkontek

src/PowerPlatform/Dataverse/data/_file_operations.py

@@ -200,6 +200,7 @@ def _download_file(
         if file_name is None:
             raise ValueError("Response is missing the 'x-ms-file-name' header. The file column may be empty or the server did not return the expected header.")
         return file_name, response.content
+    
     def _delete_file(
         self,
         entity_set: str,