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

@@ -563,7 +563,7 @@ def __next__(self) -> Any:
         except Exception as e:
             self.span.update(level="ERROR", status_message=str(e)).end()
 
-            raise e
+            raise
 
 
 class _ContextPreservedAsyncGeneratorWrapper: