Changed a logging level

- Changed the log for when the big brother cog doesn't load in the `apply_ban()` method doesn't properly load from a trace to an error.

bot/cogs/moderation/infractions.py

@@ -253,7 +253,7 @@ async def apply_ban(self, ctx: Context, user: UserSnowflake, reason: str, **kwar
 
         bb_cog = self.bot.get_cog("Big Brother")
         if not bb_cog:
-            log.trace(f"Big Brother cog not loaded; perma-banned user {user} won't be unwatched.")
+            log.error(f"Big Brother cog not loaded; perma-banned user {user} won't be unwatched.")
             return
 
         log.trace(f"Big Brother cog loaded; attempting to unwatch perma-banned user {user}.")