fix: prevent udp ka from throwing error on close (#1425)

Author: LordOfPolls

interactions/api/voice/voice_gateway.py

@@ -280,6 +280,8 @@ def _udp_keep_alive(self) -> None:
             except socket.error as e:
                 self.logger.warning(f"Ending Keep Alive due to {e}")
                 return
+            except AttributeError:
+                return
             except Exception as e:
                 self.logger.debug("Keep Alive Error: ", exc_info=e)
         self.logger.debug("Ending UDP Keep Alive")