Malformed game stats

```
future: exception=JSONDecodeError("Expecting ',' delimiter: line 1 column 34443 (char 34442)")>
Traceback (most recent call last):
File "/code/server/stats/game_stats_service.py", line 27, in process_game_stats
for army_stats in json.loads(stats_json)['stats']:
File "/usr/local/lib/python3.7/json/__init__.py", line 348, in loads
return _default_decoder.decode(s)
File "/usr/local/lib/python3.7/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/local/lib/python3.7/json/decoder.py", line 353, in raw_decode
obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 1 column 34443 (char 34442)
```