DOC: Update meeseeksmachine reference

[mroeschke]

No description provided.

[lithomas1]

Wait, ... they changed it? 😱

I remember using @meeseeksdev still worked, at least a couple weeks back.

[mroeschke]

Idk I tried using it in #57078 and wasn't getting a response from the old command. Also probably best to change this since meeseeksdev points to a user profile now

[datapythonista]

@meeseeksdev hello

[lumberbot-app]

Helloooo @datapythonista, I'm Mr. Meeseeks! Look at me!

[datapythonista]

I have the feeling that using @meeseeksdev is like when we use /preview, not really tagging that user, but just the keyword for the bot. I still see in all the docs that the right command is @meeseeksdev, and from the above test seems like it's still working. Happy to get this merged if I'm missing something, but in general I don't think this is needed.

[mroeschke]

Ah OK maybe I was impatient with the response time of the bot so I'll close this PR