Python version update to 3.8

Should work with 3.7 too

upload_wotb_replays.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python3.7
+#!/usr/bin/env python3.8
 
 import json, argparse, inspect, sys, os, base64, aiohttp, urllib, asyncio, aiofiles, aioconsole
 import logging, re, concurrent.futures, configparser, motor.motor_asyncio, ssl, pymongo