Update langfuse/_client/observe.py

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

Author: hassiebp

langfuse/_client/observe.py

@@ -628,4 +628,4 @@ async def __anext__(self) -> Any:
         except Exception as e:
             self.span.update(level="ERROR", status_message=str(e)).end()
 
-            raise e
+            raise