fix(moderation): fixed a type-error

moderation/moderation.py

@@ -1,4 +1,4 @@
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 import logging
 import time
 import discord
@@ -75,7 +75,8 @@ class Moderation(commands.Cog):
             moderation_type = 'UNBAN'
         elif entry.action == discord.AuditLogAction.member_update:
             if entry.after.timed_out_until is not None:
-                duration_datetime = datetime.now() - entry.after.timed_out_until
+                timed_out_until_aware = entry.after.timed_out_until.replace(tzinfo=timezone.utc)
+                duration_datetime = datetime.now(tz=timezone.utc) - timed_out_until_aware
                 minutes = round(duration_datetime.total_seconds() / 60)
                 duration = timedelta(minutes=minutes)
                 moderation_type = 'TIMEOUT'