[sites:twitch] Retry if KeyError from gql request

Author: xenova

chat_downloader/sites/twitch.py

@@ -1238,7 +1238,7 @@ def get_chat_by_vod_id(self, vod_id, params):
             try:
                 video = self._download_gql(query)[0]['data']['video']
                 break
-            except (JSONDecodeError, RequestException) as e:
+            except (JSONDecodeError, RequestException, KeyError) as e:
                 self.retry(attempt_number, error=e, **params)
 
         if not video: