Actually track votes in session_votes

bot/cogs/core/voting.py

@@ -31,6 +31,7 @@ async def vote(self, *, user_id: int, site: str, is_weekend: bool, is_test: bool
             return
 
         self.logger.info(f"{user_id} voted on {site}")
+        self.bot.session_votes += 1
 
         user = self.bot.get_user(user_id)