Fix typo in outputs key

Author: krassowski

jupyter_ydoc/ynotebook.py

@@ -345,7 +345,7 @@ def _update_cell(self, old_cell: dict, new_cell: dict, old_ycell: Map) -> bool:
         for key in shared_keys:
             if old_cell[key] != new_cell[key]:
                 value = new_cell[key]
-                if key == "output" and value:
+                if key == "outputs" and value:
                     # outputs require complex handling - some have Text type nested;
                     # for now skip creating them; clearing all outputs is fine
                     return False