Use Guild.active_threads since channel.active_theads() was removed

Author: ChrisLovering

bot/utils/helpers.py

@@ -62,7 +62,10 @@ def predicate(message: discord.Message) -> bool:
             return thread
 
     logger.info("Message not found in either cache, fetching all threads...")
-    for thread in await channel.active_threads():
+    for thread in await channel.guild.active_threads():
+        if thread.parent != channel:
+            continue
+
         if await _check_first_message_referencing(thread, message_id):
             logger.info("Thread found in fetched threads!")
             return thread