Documentation on Servers appears to be Outdated

[Gabz4200]

Godot Version: 4.3

Summarized Issue description: I was trying to learn about custom godot servers, couldnt find nothing anywhere and the only info on the documentation appears to be outdated to Godot 3.5.

More detailed Issue description: While trying to learn about Godot Servers, for a Gdextension I am making, I, of course, read the documentation. But, aparently, it has some problems. First I tought it was a change when trying to do server with Gdextension API, since the documentations not aways covers this differences right away. So I tried to search on the topic to give more info here, but it was too hard to found any content on the topic, I think it being named "servers" doesnt help, since a lot of Multiplayer and Dedicated Servers content poped up. But what I could find was, by looking on Godot oficial repository branchs, the last appearance of "RID_Data", a class this page of documentation talks about, is on the 3.5 branch, if it still exists, I have no clue in what file it is now, but I think it got totally changed since the Rid class changed a bit to have that RID_AllocBase and an Int Id on its own. Reference links send me to the correct file on master tho, even with its direcory having changed across branchs.

URL to the documentation page: https://docs.godotengine.org/en/stable/contributing/development/core_and_modules/custom_godot_servers.html