CloseSupportThreads: Archive resolved threads on locking (#103)

Author: IsaacG

cogs/close_support.py

@@ -70,5 +70,5 @@ async def on_raw_reaction_add(self, payload) -> None:
             return
 
         logger.debug("Locking thread %d due to owner resolving it.", payload.channel_id)
-        await thread.edit(locked=True)
+        await thread.edit(locked=True, archived=True)
         PROM_CLOSED.inc()