Fixed _callbacks.py did not reraise CancelledError

src/mab/bot/_callbacks.py

@@ -54,6 +54,8 @@ class Callbacks:
             try:
                 if not await callback_info.filter(room, event, self._client):
                     continue
+            except asyncio.CancelledError:
+                raise
             except:
                 self._logger.error(traceback.format_exc())
                 continue