feat(voice): disable rearrange_voice_channels at startup

The rearrange_voice_channels was commented out in the startup sequence. It improves the startup performance and efficiency by reducing the number of tasks running at startup to only essential tasks.

main.py

@@ -73,7 +73,7 @@ async def on_ready():
     print(f'Logged in as {client.user} (ID: {client.user.id})')
     print('------')
     check_voice_channels.start()
-    rearrange_voice_channels.start()
+    # rearrange_voice_channels.start()
     check_no_roles_assigned.start()