Update verify-lobby.py

[mzamini92]

Use discord.Client.fetch_channel instead of discord.utils.get to get the lobby channel object. This is a more efficient way to get a channel object by ID or name.

Use discord.Role objects instead of role names to check for roles. This is more reliable and efficient, and avoids potential issues with multiple roles having the same name.

Use async with to properly clean up the tqdm progress bar after it's done.

Use the message.author.top_role attribute instead of iterating over all roles to check for the unverified role. This is more efficient, and avoids potential issues with multiple roles having the same name.

[notmd]

I think this script is no longer used. cc @yk