Lower level of log about missing channel to info

If e.g. a moderator deleted it already this is expected so no need for a sentry alert

Author: wookie184

bot/exts/moderation/infraction/_scheduler.py

@@ -121,7 +121,7 @@ async def _delete_infraction_message(
             await partial_message.delete()
             log.trace(f"Deleted infraction message {message_id} in channel {channel_id}.")
         except discord.NotFound:
-            log.warning(f"Channel or message {message_id} not found in channel {channel_id}.")
+            log.info(f"Channel or message {message_id} not found in channel {channel_id}.")
         except discord.Forbidden:
             log.info(f"Bot lacks permissions to delete message {message_id} in channel {channel_id}.")
         except discord.HTTPException as e: